diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 0000000..cef07bf
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,26 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.9"
+  jobs:
+    pre_build:
+      - make apidoc
+      - breathe-apidoc -o docs/api apidoc/xml
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  builder: dirhtml
+  configuration: docs/conf.py
+
+# Optionally declare the Python requirements required to build your docs
+python:
+  install:
+  - requirements: docs/requirements.txt
diff --git a/docs/.gitignore b/docs/.gitignore
index 23f832b..11f197b 100644
--- a/docs/.gitignore
+++ b/docs/.gitignore
@@ -1,2 +1,4 @@
 *.html
 *.pdf
+_build/
+api/
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..47510f9
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,40 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+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 clean apidoc breathe_apidoc Makefile
+
+# Intercept the 'clean' target so we can do the right thing for apidoc as well
+clean:
+	@# Clean the apidoc
+	$(MAKE) -C .. apidoc_clean
+	@# Clean the breathe-apidoc generated files
+	rm -rf ./api
+	@# Clean the sphinx docs
+	@$(SPHINXBUILD) -M clean "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+apidoc:
+	@# Generate doxygen from source using the main Makefile
+	$(MAKE) -C .. apidoc
+
+breathe_apidoc: apidoc
+	@# Remove existing files - breathe-apidoc skips them if they're present
+	rm -rf ./api
+	@# Generate RST file structure with breathe-apidoc
+	breathe-apidoc -o ./api ../apidoc/xml
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile breathe_apidoc
+	@# Build the relevant target with sphinx
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..41c50c7
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,34 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+import glob
+
+project = 'Mbed TLS Versioned'
+copyright = '2023, Mbed TLS Contributors'
+author = 'Mbed TLS Contributors'
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = ['breathe', 'sphinx.ext.graphviz']
+
+templates_path = ['_templates']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+breathe_projects = {
+    'mbedtls-versioned': '../apidoc/xml'
+}
+breathe_default_project = 'mbedtls-versioned'
+
+primary_domain = 'c'
+highlight_language = 'c'
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'sphinx_rtd_theme'
+html_static_path = ['_static']
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..33a9722
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,20 @@
+.. Mbed TLS Versioned documentation master file, created by
+   sphinx-quickstart on Thu Feb 23 18:13:44 2023.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Mbed TLS API documentation
+==========================
+
+.. doxygenpage:: index
+   :project: mbedtls-versioned
+
+.. toctree::
+   :caption: Contents
+   :maxdepth: 1
+
+   Home <self>
+   api/grouplist.rst
+   api/filelist.rst
+   api/structlist.rst
+   api/unionlist.rst
diff --git a/docs/requirements.in b/docs/requirements.in
new file mode 100644
index 0000000..a523188
--- /dev/null
+++ b/docs/requirements.in
@@ -0,0 +1,2 @@
+sphinx-rtd-theme
+breathe
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..4b9f3a6
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,66 @@
+#
+# This file is autogenerated by pip-compile with Python 3.9
+# by the following command:
+#
+#    pip-compile requirements.in
+#
+alabaster==0.7.13
+    # via sphinx
+babel==2.12.1
+    # via sphinx
+breathe==4.35.0
+    # via -r requirements.in
+certifi==2022.12.7
+    # via requests
+charset-normalizer==3.1.0
+    # via requests
+docutils==0.17.1
+    # via
+    #   breathe
+    #   sphinx
+    #   sphinx-rtd-theme
+idna==3.4
+    # via requests
+imagesize==1.4.1
+    # via sphinx
+importlib-metadata==6.0.0
+    # via sphinx
+jinja2==3.1.2
+    # via sphinx
+markupsafe==2.1.2
+    # via jinja2
+packaging==23.0
+    # via sphinx
+pygments==2.14.0
+    # via sphinx
+requests==2.28.2
+    # via sphinx
+snowballstemmer==2.2.0
+    # via sphinx
+sphinx==4.5.0
+    # via
+    #   breathe
+    #   sphinx-rtd-theme
+sphinx-rtd-theme==1.2.0
+    # via -r requirements.in
+sphinxcontrib-applehelp==1.0.4
+    # via sphinx
+sphinxcontrib-devhelp==1.0.2
+    # via sphinx
+sphinxcontrib-htmlhelp==2.0.1
+    # via sphinx
+sphinxcontrib-jquery==2.0.0
+    # via sphinx-rtd-theme
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.3
+    # via sphinx
+sphinxcontrib-serializinghtml==1.1.5
+    # via sphinx
+urllib3==1.26.15
+    # via requests
+zipp==3.15.0
+    # via importlib-metadata
+
+# The following packages are considered to be unsafe in a requirements file:
+# setuptools
diff --git a/doxygen/mbedtls.doxyfile b/doxygen/mbedtls.doxyfile
index 1b73cf6..78299ed 100644
--- a/doxygen/mbedtls.doxyfile
+++ b/doxygen/mbedtls.doxyfile
@@ -19,6 +19,9 @@
 HTML_TIMESTAMP         = YES
 SEARCHENGINE           = YES
 GENERATE_LATEX         = NO
+GENERATE_XML           = YES
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = YES
 INCLUDE_PATH           = ../include
 CLASS_DIAGRAMS         = NO
 HAVE_DOT               = YES
@@ -40,3 +43,12 @@
 #     \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
 # This avoids writing redundant text and keeps Clang happy.
 ALIASES += emptydescription=""
+
+# Define away Mbed TLS macros that make parsing definitions difficult.
+# MBEDTLS_DEPRECATED is not included in this list as it's important to
+# display deprecated status in the documentation.
+PREDEFINED             = "MBEDTLS_CHECK_RETURN_CRITICAL="   \
+                         "MBEDTLS_CHECK_RETURN_TYPICAL="    \
+                         "MBEDTLS_CHECK_RETURN_OPTIONAL="   \
+                         "MBEDTLS_PRINTF_ATTRIBUTE(a,b)="   \
+
diff --git a/include/mbedtls/bignum.h b/include/mbedtls/bignum.h
index 788ea21..f66379d 100644
--- a/include/mbedtls/bignum.h
+++ b/include/mbedtls/bignum.h
@@ -1039,7 +1039,7 @@
  *                 This must point to an initialized MPI.
  * \param rounds   The number of bases to perform the Miller-Rabin primality
  *                 test for. The probability of returning 0 on a composite is
- *                 at most 2<sup>-2*\p rounds</sup>.
+ *                 at most 2<sup>-2*\p rounds </sup>.
  * \param f_rng    The RNG function to use. This must not be \c NULL.
  * \param p_rng    The RNG parameter to be passed to \p f_rng.
  *                 This may be \c NULL if \p f_rng doesn't use