diff --git a/docs/_sidebar.md b/docs/_sidebar.md
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     - [Precompiled Contracts](/wiki/EL/precompiled-contracts.md)
   - [Block Building](/wiki/EL/block-production.md)
   - [Data Structures](/wiki/EL/data-structures.md)
+    - [Summary](/wiki/EL/el-data-structures-summary.md)
   - [Transaction anatomy](/wiki/EL/transaction.md)
   - [JSON-RPC](/wiki/EL/JSON-RPC.md)
   - [DevP2P](/wiki/EL/devp2p.md)
diff --git a/docs/wiki/EL/el-data-structures-summary.md b/docs/wiki/EL/el-data-structures-summary.md
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+# Ethereum Execution Layer Data Structures
+
+# Block
+## block_header
+- **block_header**
+    - parent_hash // Hash of the previous block
+    - ommers_hash // Hash of the ommers (a.k.a. uncles) list
+    - beneficiary // Address of the miner or validator who receives block rewards
+    - state_root // Root hash of the world state trie after all txs are executed
+    - transactions_root // Root hash of the transaction trie for this block
+    - receipts_root // Root hash of the receipt trie for this block
+    - logs_bloom // Bloom filter summarizing all logs from receipts in this block
+    - difficulty  // PoW: difficulty of the block
+    - number // Block number (height in the chain)
+    - gas_limit // Maximum amount of gas allowed in this block
+    - gas_used // Total gas used by all transactions in this block
+    - timestamp // Unix timestamp for when the block was proposed
+    - extra_data // Arbitrary 32-byte field for additional data (e.g. miner ID)
+    - mix_hash / prev_randao // PoW: used in nonce verification; PoS: random seed for validators [EIP-4399](https://eips.ethereum.org/EIPS/eip-4399) – Paris
+    - nonce // PoW only: solution for the mining puzzle
+    - base_fee_per_gas // Minimum base fee per gas [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) – London
+    - withdrawals_root // Root of the withdrawals list trie [EIP-4895](https://eips.ethereum.org/EIPS/eip-4895) – Shanghai
+    - base_fee_per_blob_gas // Minimum blob gas fee [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+    - blob_gas_used // Total blob gas used in the block [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+    - excess_blob_gas // Rolling counter of unused blob gas [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+    - parent_beacon_block_root // SSZ root of the parent beacon block [EIP-4788](https://eips.ethereum.org/EIPS/eip-4788) – Dencun
+    - requests_root // Root hash of EL-generated cross-layer requests [EIP-7685](https://eips.ethereum.org/EIPS/eip-7685) – Pectra
+## block_body
+- **block_body**
+    - transactions[] // List of transactions executed in the block, in order
+    - ommers[] // List of ommer (uncle) block headers (legacy, empty in PoS)
+    - withdrawals[] // List of ETH withdrawals for validators [EIP-4895](https://eips.ethereum.org/EIPS/eip-4895) – Shanghai
+    - requests[] // List of cross-layer requests generated by execution [EIP-7685](https://eips.ethereum.org/EIPS/eip-7685) – Pectra
+
+
+# state_trie 
+- (rooted at state_root)
+- keccak(address1) -> RLP(nonce, balance, storage_root, code_hash)
+    - nonce // Number of transactions sent (EOA) or created (contract)
+    - balance // ETH balance of the account, in wei
+    - storage_root // Root of this account's storage trie (contracts only)
+    - code_hash // keccak256 hash of the account's code (contracts) or empty hash (EOAs)
+    - storage_trie (if contract)  
+      - keccak(slot0) -> RLP(value0) // Contract storage: key-value pairs at specific slots
+- keccak(address2) -> ...
+
+# transaction_trie 
+- (rooted at transactions_root)
+## Legacy Transaction (type 0x00) 
+- [pre-EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) – Frontier
+
+
+- RLP(0) -> Transaction 0
+    - RLP(nonce, gas_price, gas_limit, to, value, data, v, r, s)
+        - nonce // Number of txs sent by sender prior to this
+        - gas_price // Legacy pricing model: gas price per unit
+        - gas_limit // Max gas this tx is allowed to consume
+        - to // Recipient address or empty (for contract creation)
+        - value // ETH to transfer in wei
+        - data // Call data for contract interaction or init code for creation
+        - v, r, s // Signature components (used to recover sender address)
+
+## Access List Transaction (type 0x01)
+- [EIP-2930](https://eips.ethereum.org/EIPS/eip-2930) – Berlin
+
+
+- RLP(0) -> Transaction 0
+    - RLP(chain_id, nonce, gas_price, gas_limit, to, value, data, access_list, v, r, s)
+    - Extends **Legacy Transaction** by adding:
+        - chain_id // [EIP-155](https://eips.ethereum.org/EIPS/eip-155) – Spurious Dragon
+        - access_list // list of addresses/storage keys to be accessed [EIP-2930](https://eips.ethereum.org/EIPS/eip-2930) – Berlin
+
+## Dynamic-Fee Transaction (type 0x02) 
+- [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) – London
+
+
+- RLP(0) -> Transaction 0
+    - RLP(chain_id, nonce, max_priority_fee_per_gas, max_fee_per_gas, gas_limit, to, value, data, access_list, v, r, s)
+    - Extends **Access List Transaction** by replacing `gas_price` with:
+        - max_priority_fee_per_gas //tip for the validator [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) – London
+        - max_fee_per_gas // maximum fee willing to pay per unit of gas [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) – London
+
+## Blob-Carrying Transaction (type 0x03) 
+- [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+
+
+- RLP(0) -> Transaction 0
+    - RLP(chain_id, nonce, max_priority_fee_per_gas, max_fee_per_gas, gas_limit, to, value, data, access_list, max_fee_per_blob_gas, blob_versioned_hashes, v, r, s)
+    - Extends **Dynamic-Fee Transaction** by adding:
+        - max_fee_per_blob_gas // Maximum fee willing to pay per blob gas unit  [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+        - blob_versioned_hashes // List of hashes for each blob [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) – Dencun
+...
+
+# receipt_trie 
+- (rooted at receipts_root)
+
+- RLP(0) -> receipt_0
+    - type // Receipt type byte prefix [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) – Berlin
+    - status // 1 = success, 0 = failure [EIP-658](https://eips.ethereum.org/EIPS/eip-658) – Byzantium ; pre-Byzantium: state_root
+    - cumulative_gas_used // Total gas used up to and including this tx in the block
+    - logs_bloom // 256-byte bloom filter summarizing all logs from this tx
+    - logs[] // List of event logs emitted during execution
+        - address // Address of the contract that emitted the log
+        - topics[] // Array of indexed topics (includes event signature)
+        - data // ABI-encoded non-indexed event data
+- RLP(1) -> receipt_1  
+  ...
+
+# withdrawals entries
+- withdrawals(0) -> withdrawal_0
+  - validator_index // Index of the validator making the withdrawal
+  - address // Address to receive the withdrawal
+  - amount // Amount in gwei
\ No newline at end of file