diff --git a/source/architecture/design/data-pipelines/classes.drawio.png b/source/architecture/design/data-pipelines/classes.drawio.png
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diff --git a/source/architecture/design/index.html.md.erb b/source/architecture/design/index.html.md.erb
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--- a/source/architecture/design/index.html.md.erb
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@@ -21,4 +21,8 @@ The solution architecture has been modelled using the C4 approach.
 
 #### Interaction
 
-![Data Pipelines container interaction](/architecture/design/data-pipelines/container-interaction.drawio.png)
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+![Data Pipelines container interaction](/architecture/design/data-pipelines/container-interaction.drawio.png)
+
+#### Classes (WIP)
+
+![Data Pipelines classes](/architecture/design/data-pipelines/classes.drawio.png)
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