Historically significant blocks and transactions. Each one revealed something new about the protocol.
The block that started it all
Block 0 was hardcoded into Bitcoin's source code by Satoshi Nakamoto. Its coinbase contains the famous Times headline: "Chancellor on brink of second bailout for banks."
The first person-to-person Bitcoin transfer
Satoshi Nakamoto sent 10 BTC to Hal Finney, a cryptographer and early Bitcoin contributor. Finney famously tweeted "Running bitcoin" just days before.
10,000 BTC buys two pizzas
The specific transaction where Laszlo Hanyecz sent 10,000 BTC to jercos for two Papa John's pizzas. The most expensive pizza purchase in history.
Data embedded permanently on-chain
This block contains the first use of OP_RETURN, a script opcode that allows embedding arbitrary data in the blockchain without creating unspendable UTXOs.
The exchange collapse that shook Bitcoin
One of the transactions linked to the Mt. Gox theft. The exchange lost 850,000 BTC, triggering the first major Bitcoin bear market.
The upgrade that fixed malleability
Block 481,824 activated Segregated Witness (SegWit), the most significant Bitcoin protocol upgrade. It moved signature data to a separate witness structure.
The heaviest transaction ever recorded
This block contains the largest Bitcoin transaction by raw size ever mined. It demonstrates the upper bounds of what the protocol allows.
Privacy through collaborative mixing
This block contains an early Wasabi Wallet CoinJoin transaction, where multiple users combine their inputs to break the common-input-ownership heuristic.
Bitcoin's newest script upgrade in action
Block 709,635 is the first block after Taproot activation to contain P2TR (Pay-to-Taproot) spends, enabling Schnorr signatures and MAST scripts.