diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index e695b0a0f..4fd430379 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -250,99 +250,106 @@ jobs:
           ctest -j 2 -VV -S dashboard.cmake
         shell: cmd
 
-#TODO: Implement Documentation Build when warnings are fixed.
-#  build-test-documentation:
-#    runs-on: ${{ matrix.os }}
-#    strategy:
-#      max-parallel: 3
-#      matrix:
-#        os: [ubuntu-18.04]
-#        include:
-#          - os: ubuntu-18.04
-#            c-compiler: "gcc"
-#            cxx-compiler: "g++"
-#            itk-git-tag: "v5.1.0"
-#            cmake-build-type: "Release"
-#
-#    steps:
-#      - uses: actions/checkout@v1
-#
-#      - name: Set up Python 3.7
-#        uses: actions/setup-python@v1
-#        with:
-#          python-version: 3.7
-#
-#      - name: Install build dependencies
-#        run: |
-#          sudo apt-get update
-#          sudo apt-get install gnuplot dvipng
-#
-#          python -m pip install --upgrade pip
-#          python -m pip install ninja
-#          python -m pip install sphinx
-#
-#
-#      - name: Download ITK
-#        run: |
-#          cd ..
-#          git clone https://github.com/InsightSoftwareConsortium/ITK.git
-#          cd ITK
-#          git checkout ${{ matrix.itk-git-tag }}
-#
-#      - name: Build ITK
-#        run: |
-#          cd ..
-#          mkdir ITK-build
-#          cd ITK-build
-#          cmake -DBUILD_DOCUMENTATION:BOOL=ON -DCMAKE_C_COMPILER:FILEPATH="${{ matrix.c-compiler }}" -DBUILD_SHARED_LIBS:BOOL=ON -DCMAKE_CXX_COMPILER="${{ matrix.cxx-compiler }}" -DCMAKE_BUILD_TYPE:STRING=${{ matrix.cmake-build-type }} -DBUILD_TESTING:BOOL=OFF -GNinja ../ITK
-#          ninja
-#
-#      - name: Fetch CTest driver script
-#        run: |
-#          curl -L https://raw.githubusercontent.com/InsightSoftwareConsortium/ITK/dashboard/itk_common.cmake -O
-#
-#      - name: Configure CTest script
-#        shell: bash
-#        run: |
-#          operating_system="${{ matrix.os }}"
-#          cat > dashboard.cmake << EOF
-#          set(CTEST_SITE "GitHubActions")
-#          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/.." CTEST_DASHBOARD_ROOT)
-#          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/" CTEST_SOURCE_DIRECTORY)
-#          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/../build" CTEST_BINARY_DIRECTORY)
-#          set(dashboard_source_name "${GITHUB_REPOSITORY}")
-#          if(ENV{GITHUB_REF} MATCHES "master")
-#            set(branch "-master")
-#            set(dashboard_model "Continuous")
-#          else()
-#            set(branch "-${GITHUB_REF}")
-#            set(dashboard_model "Experimental")
-#          endif()
-#          set(CTEST_BUILD_NAME "${GITHUB_REPOSITORY}-${operating_system}-\${branch}")
-#          set(CTEST_UPDATE_VERSION_ONLY 1)
-#          set(CTEST_TEST_ARGS \${CTEST_TEST_ARGS} PARALLEL_LEVEL \${PARALLEL_LEVEL})
-#          set(CTEST_BUILD_CONFIGURATION "Release")
-#          set(CTEST_CMAKE_GENERATOR "Ninja")
-#          set(CTEST_CUSTOM_WARNING_EXCEPTION
-#            \${CTEST_CUSTOM_WARNING_EXCEPTION}
-#            # macOS Azure VM Warning
-#            "ld: warning: text-based stub file"
-#            )
-#          set(dashboard_no_clean 1)
-#          set(ENV{CC} ${{ matrix.c-compiler }})
-#          set(ENV{CXX} ${{ matrix.cxx-compiler }})
-#          set(dashboard_cache "
-#          ITK_DIR:PATH=\${CTEST_DASHBOARD_ROOT}/ITK-build
-#          BUILD_TESTING:BOOL=ON
-#          BUILD_DOCUMENTATION:BOOL=ON
-#          ")
-#          string(TIMESTAMP build_date "%Y-%m-%d")
-#          message("CDash Build Identifier: \${build_date} \${CTEST_BUILD_NAME}")
-#          message("CTEST_SITE = \${CTEST_SITE}")
-#          include(\${CTEST_SCRIPT_DIRECTORY}/itk_common.cmake)
-#          EOF
-#          cat dashboard.cmake
-#
-#      - name: Build and test
-#        run: |
-#          ctest -j 2 -VV -S dashboard.cmake
+  build-test-documentation:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      max-parallel: 3
+      matrix:
+        os: [ubuntu-18.04]
+        include:
+          - os: ubuntu-18.04
+            c-compiler: "gcc"
+            cxx-compiler: "g++"
+            itk-git-tag: "e2c71059e47d5e77c647aab5b799121090fdf4ec"
+            cmake-build-type: "Release"
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+
+      - name: Get specific version of CMake, Ninja
+        uses: lukka/get-cmake@v3.18.3
+
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install gnuplot dvipng
+          sudo apt-get install texlive-full
+
+          python -m pip install --upgrade pip
+          python -m pip install ninja
+          python -m pip install sphinx==3.0.4
+          python -m pip install --ignore-installed six
+
+      - name: Remove Duplicate Declaration Warnings
+        run: |
+          sed -i "6559d" /opt/hostedtoolcache/Python/3.8.6/x64/lib/python3.8/site-packages/sphinx/domains/cpp.py
+
+      - name: Download ITK
+        run: |
+          cd ..
+          git clone https://github.com/InsightSoftwareConsortium/ITK.git
+          cd ITK
+          git checkout ${{ matrix.itk-git-tag }}
+
+      - name: Build ITK
+        run: |
+          cd ..
+          mkdir ITK-build
+          cd ITK-build
+          cmake -DCMAKE_C_COMPILER:FILEPATH="${{ matrix.c-compiler }}" -DBUILD_SHARED_LIBS:BOOL=ON -DCMAKE_CXX_COMPILER="${{ matrix.cxx-compiler }}" -DCMAKE_BUILD_TYPE:STRING=${{ matrix.cmake-build-type }} -DBUILD_TESTING:BOOL=OFF -GNinja ../ITK
+          ninja
+
+      - name: Fetch CTest driver script
+        run: |
+          curl -L https://raw.githubusercontent.com/InsightSoftwareConsortium/ITK/dashboard/itk_common.cmake -O
+
+      - name: Configure CTest script
+        shell: bash
+        run: |
+          operating_system="${{ matrix.os }}"
+          cat > dashboard.cmake << EOF
+          set(CTEST_SITE "GitHubActions")
+          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/.." CTEST_DASHBOARD_ROOT)
+          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/" CTEST_SOURCE_DIRECTORY)
+          file(TO_CMAKE_PATH "${GITHUB_WORKSPACE}/../build" CTEST_BINARY_DIRECTORY)
+          set(dashboard_source_name "${GITHUB_REPOSITORY}")
+          if(ENV{GITHUB_REF} MATCHES "master")
+            set(branch "-master")
+            set(dashboard_model "Continuous")
+          else()
+            set(branch "-${GITHUB_REF}")
+            set(dashboard_model "Experimental")
+          endif()
+          set(CTEST_BUILD_NAME "${GITHUB_REPOSITORY}-${operating_system}-\${branch}")
+          set(CTEST_UPDATE_VERSION_ONLY 1)
+          set(CTEST_TEST_ARGS \${CTEST_TEST_ARGS} PARALLEL_LEVEL \${PARALLEL_LEVEL})
+          set(CTEST_BUILD_CONFIGURATION "Release")
+          set(CTEST_CMAKE_GENERATOR "Ninja")
+          set(CTEST_CUSTOM_WARNING_EXCEPTION
+            \${CTEST_CUSTOM_WARNING_EXCEPTION}
+            # macOS Azure VM Warning
+            "ld: warning: text-based stub file"
+            )
+          set(dashboard_no_clean 1)
+          set(ENV{CC} ${{ matrix.c-compiler }})
+          set(ENV{CXX} ${{ matrix.cxx-compiler }})
+          set(dashboard_cache "
+          ITK_DIR:PATH=\${CTEST_DASHBOARD_ROOT}/ITK-build
+          BUILD_TESTING:BOOL=ON
+          BUILD_DOCUMENTATION:BOOL=ON
+          ")
+          string(TIMESTAMP build_date "%Y-%m-%d")
+          message("CDash Build Identifier: \${build_date} \${CTEST_BUILD_NAME}")
+          message("CTEST_SITE = \${CTEST_SITE}")
+          include(\${CTEST_SCRIPT_DIRECTORY}/itk_common.cmake)
+          EOF
+          cat dashboard.cmake
+
+      - name: Build and test
+        run: |
+          ctest -j 2 -VV -S dashboard.cmake