diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..51285967a7d9722c5bdee4f6a81c154a56aa0846
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,19 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS =
+SPHINXBUILD = sphinx-build
+SOURCEDIR = .
+BUILDDIR = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+ @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+ @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/admin/00_index.rst b/docs/admin/00_index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..f66e0fd37c36254125691eb357d0418fa46e8e6b
--- /dev/null
+++ b/docs/admin/00_index.rst
@@ -0,0 +1,7 @@
+Importing timetables and substitutions from Untis
+=================================================
+
+.. toctree::
+ :glob:
+
+ *
diff --git a/docs/admin/10_features.rst b/docs/admin/10_features.rst
new file mode 100644
index 0000000000000000000000000000000000000000..051a4901ab79dc7a4aaa9f811d1f8cf929012e28
--- /dev/null
+++ b/docs/admin/10_features.rst
@@ -0,0 +1,36 @@
+Untis data and their relation to AlekSIS
+========================================
+
+Untis is a proprietary timetable management software which is popular
+in the German-speaking area, but used internationally. AlekSIS provides
+functionality to automatically import data from Untis into data models
+of the core and `Chronos`, the timetable and substitution app of AlekSIS.
+
+Currently, we only support importing data from the MySQL database of
+`Untis MultiUser`. This is done through configurable background tasks
+which are executed in a specific interval or at specific points in time.
+
+Supported Untis features
+------------------------
+
+Not all features of Untis are supported in AlekSIS. The following
+information form Untis can be imported into AlekSIS:
+
+* Terms
+* Holidays
+* Classes, teachers, subjects
+* Rooms, supervision areas (corridors in Untis)
+* Lesson and break times
+* Timetable data (lessons, supervisions)
+* Absences, absence reasons
+* Substitutions, extra lessons, cancellations
+* Events
+
+Currently, the following features are known not to be supported:
+
+* Students, student groups, student choices
+* Exams
+* Calendars
+* Prebookings
+* Statistical data
+* Special rooms (subject and group rooms)
diff --git a/docs/admin/20_configuration.rst b/docs/admin/20_configuration.rst
new file mode 100644
index 0000000000000000000000000000000000000000..be9cf3eb2ed22e8059783760d42814f759b9d9f1
--- /dev/null
+++ b/docs/admin/20_configuration.rst
@@ -0,0 +1,105 @@
+Setting up the Untis integration
+================================
+
+Requirements
+------------
+
+To use the importer, you must have a current Untis MultiUser
+license (version 2019 and above) and a MySQL database which
+is reachable by the AlekSIS server. How to configure Untis
+to use this database is described in the `Untis MultiUser Manual`_.
+
+In addition to the technical requirements of AlekSIS itself,
+a few extra system packages are required:
+
+.. code-block:: shell
+
+ apt install libmariadb-dev
+
+The MySQL (or MariaDB) server must be reachable from the AlekSIS
+server, and a user account in the database is needed. It is sufficient
+to create this user with ``SELECT`` permissions. On the MySQL shell,
+you can create such a user with something like:
+
+.. code-block:: sql
+
+ CREATE USER `aleksis`@`aleksisserver` IDENTIFIED BY 'securepassword';
+ GRANT SELECT ON `untis`.* TO `aleksis`@`aleksisserver`;
+ FLUSH PRIVILEGES;
+
+.. _Untis MultiUser Manual: https://help.Untis.at/hc/de/article_attachments/360004504079/Untis_MultiUser.pdf
+
+Configure database connection
+-----------------------------
+
+In the AlekSIS configuration file, you have to set following settings:
+
+.. code-block:: toml
+
+ [untis.database]
+ enabled = true
+ name = "untis"
+ user = "aleksis"
+ password = "securepassword"
+ host = "mysqlserver"
+ port = 3306
+
+Customise how data are imported
+-------------------------------
+
+The way data are imported can be configured from the menu under
+`Admin → Configuration → Untis`. The following preferences are available:
+
+* **Update values of existing subjects:** This will update the values of
+ already existing subjects if Untis has different data.
+* **Update short name of existing persons:** This will update the short
+ name of already existing persons if Untis has different data.
+* **Update name of existing persons:** This will update the name of
+ already existing persons if Untis has different data.
+* **Update short name of existing groups:** This will update the short name
+ of already existing groups if Untis has different data.
+* **Update name of existing groups:** This will update the name of already
+ existing groups if Untis has different data.
+* **Overwrite group owners:** This will update the group owners of already
+ existing groups if Untis has different data.
+* **Update name of existing rooms:** This will update the name of already
+ existing rooms if Untis has different data.
+* **Update existing supervision areas:** This will update the values of
+ already existing supervision areas if Untis has different data.
+* **Use course groups:** This will build or search course groups (groups
+ for each subject in a class) instead of setting the classes as groups.
+
+Scheduling import tasks
+-----------------------
+
+The integration provides different background tasks to import the data from Untis:
+
+* ``untis_import_mysql_current_term``: This will import all data from the **current**
+ Untis term.
+* ``untis_import_mysql_future_terms``: This will import all data from all **future**
+ Untis terms, but not from the current.
+* ``untis_import_mysql_all_terms``: This will import all data from **all** Untis
+ terms which are in the database.
+* ``untis_import_mysql_current_next_term``: This will import all data from the
+ **current and the directly following** Untis term.
+* ``untis_import_mysql_current_future_terms``: This will import all data from the
+ **current and all future** Untis terms.
+
+We suggest using ``untis_import_mysql_current_next_term`` as a task because this will
+ensure that all current data are up-to-date, but also that the next timetable version
+is also already imported when it becomes reelvant.
+
+In general, all tasks will do nothing if there is no matching Untis term.
+
+To use these tasks, you have to add them as periodic tasks.
+
+How existing data is matched
+----------------------------
+
+If there are already existing data in AlekSIS' database, the Untis import will
+always try to combine these data. The main data field used for this is the
+``short name`` field. If the data were imported one time, each object in
+Chronos will save the respective ID from Untis to make sure that the data are
+properly updated at the next import.
+
+The import is thus idempotent.
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000000000000000000000000000000000000..4bb4608ad4036e6f67698ad5e2f098497f002020
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,207 @@
+# -*- coding: utf-8 -*-
+#
+# Configuration file for the Sphinx documentation builder.
+#
+# This file does only contain a selection of the most common options. For a
+# full list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+import os
+import sys
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import django
+
+sys.path.insert(0, os.path.abspath(".."))
+os.environ["DJANGO_SETTINGS_MODULE"] = "aleksis.core.settings"
+os.environ["LOCAL_SETTINGS_FILE"] = os.path.abspath(os.path.join("..", "local.cfg"))
+django.setup()
+
+# -- Project information -----------------------------------------------------
+
+project = "AlekSIS-App-Untis"
+copyright = "2018-2022 The AlekSIS team"
+author = "The AlekSIS Team"
+
+# The short X.Y version
+version = "2.2"
+# The full version, including alpha/beta/rc tags
+release = "2.2.1.dev0"
+
+
+# -- General configuration ---------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+ "sphinx.ext.autodoc",
+ "sphinxcontrib_django",
+ "sphinx_autodoc_typehints",
+ "sphinx.ext.intersphinx",
+ "sphinx.ext.viewcode",
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = ".rst"
+
+# The master toctree document.
+master_doc = "index"
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = None
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages. See the documentation for
+# a list of builtin themes.
+#
+html_theme = "sphinx_material"
+
+html_favicon = "../aleksis/core/static/img/aleksis-icon.png"
+html_logo = "../aleksis/core/static/img/aleksis-banner.svg"
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further. For a list of options available for each theme, see the
+# documentation.
+#
+html_theme_options = {
+ "repo_url": f"https://edugit.org/AlekSIS/official/{project}",
+ "repo_name": "EduGit",
+ "repo_type": "gitlab",
+ "theme_color": "#0d5eaf",
+ "color_primary": "#0d5eaf",
+ "color_accent": "#0d5eaf",
+ "globaltoc_depth": 2,
+ "globaltoc_collapse": False,
+}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ["_static"]
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# The default sidebars (for documents that don't match any pattern) are
+# defined by theme itself. Builtin themes are using these templates by
+# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
+# 'searchbox.html']``.
+#
+html_sidebars = {
+ "**": ["logo-text.html", "globaltoc.html", "localtoc.html", "searchbox.html"]
+}
+
+
+# -- Options for HTMLHelp output ---------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = f"{project}doc"
+
+
+# -- Options for LaTeX output ------------------------------------------------
+
+latex_elements = {
+ # The paper size ('letterpaper' or 'a4paper').
+ #
+ # 'papersize': 'letterpaper',
+ # The font size ('10pt', '11pt' or '12pt').
+ #
+ # 'pointsize': '10pt',
+ # Additional stuff for the LaTeX preamble.
+ #
+ # 'preamble': '',
+ # Latex figure (float) alignment
+ #
+ # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+# author, documentclass [howto, manual, or own class]).
+latex_documents = [
+ (master_doc, f"{project}.tex", f"{project} Documentation", author, "manual"),
+]
+
+
+# -- Options for manual page output ------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [(master_doc, "aleksis", f"{project} Documentation", [author], 1)]
+
+
+# -- Options for Texinfo output ----------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+# dir menu entry, description, category)
+texinfo_documents = [
+ (
+ master_doc,
+ project,
+ f"{project} Documentation",
+ author,
+ project,
+ "One line description of project.",
+ "Miscellaneous",
+ ),
+]
+
+
+# -- Options for Epub output -------------------------------------------------
+
+# Bibliographic Dublin Core info.
+epub_title = project
+
+# The unique identifier of the text. This can be a ISBN number
+# or the project homepage.
+#
+# epub_identifier = ''
+
+# A unique identification for the text.
+#
+# epub_uid = ''
+
+# A list of files that should not be packed into the epub file.
+epub_exclude_files = ["search.html"]
+
+
+# -- Extension configuration -------------------------------------------------
+
+# -- Options for intersphinx extension ---------------------------------------
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {
+ "https://docs.python.org/": None,
+ "https://docs.djangoproject.com/en/stable": "https://docs.djangoproject.com/en/stable/_objects",
+}
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..0ea1f9703203d1c416aba82c5be96bd29502692c
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,24 @@
+.. AlekSIS documentation master file, created by
+ sphinx-quickstart on Thu Aug 15 10:49:03 2019.
+ You can adapt this file completely to your liking, but it should at least
+ contain the root `toctree` directive.
+
+Welcome to AlekSIS-App-Untis' documentation!
+============================================
+
+.. toctree::
+ :maxdepth: 2
+ :caption: Contents:
+
+ user/00_index
+ admin/00_index
+ dev/00_index
+ ref/00_index
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/docs/make.bat b/docs/make.bat
new file mode 100644
index 0000000000000000000000000000000000000000..27f573b87af11e2cbbd9f54eb1ee285a58550146
--- /dev/null
+++ b/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+ set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+ echo.
+ echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+ echo.installed, then set the SPHINXBUILD environment variable to point
+ echo.to the full path of the 'sphinx-build' executable. Alternatively you
+ echo.may add the Sphinx directory to PATH.
+ echo.
+ echo.If you don't have Sphinx installed, grab it from
+ echo.http://sphinx-doc.org/
+ exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+
+:end
+popd
diff --git a/pyproject.toml b/pyproject.toml
index 6ea0c9af899421ae38f83de26669a93e5a947ad8..1255f71d1e55f2b76143ad1776e56acda17d3929 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ aleksis-core = "^2.0rc"
aleksis-app-chronos = "^2.0rc"
[tool.poetry.dev-dependencies]
-aleksis-builddeps = "^5"
+aleksis-builddeps = "^6"
[tool.poetry.plugins."aleksis.app"]
untis = "aleksis.apps.untis.apps:UntisConfig"