diff --git a/spec/blockchain/blockchain.md b/spec/blockchain/blockchain.md
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+# Blockchain
+
+Deprecated see [core/data_structures.md](../core/data_structures.md)
diff --git a/spec/blockchain/encoding.md b/spec/blockchain/encoding.md
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+# Encoding
+
+Deprecated see [core/data_structures.md](../core/encoding.md)
diff --git a/spec/blockchain/readme.md b/spec/blockchain/readme.md
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+---
+cards: false
+---
+
+# Blockchain
+
+This section describes the core types and functionality of the Tendermint protocol implementation.
+
+[Core Data Structures](../core/data_structures.md)
+[Encoding](../core/encoding.md)
+[State](../core/state.md)
diff --git a/spec/blockchain/state.md b/spec/blockchain/state.md
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+# State
+
+Deprecated see [core/state.md](../core/state.md)