PixelMap

PixelMap (2016) is often considered an NFT "relic" or "antique", due to being one of the oldest NFTs in existence. The original "billboard-style" NFT, PixelMap is also known for being one of the first to store image data directly on-chain, as well as the oldest (Ethereum) NFT tradeable on OpenSea. It provides the ability to create, display, and update artwork on a "pixel map" with all historical data immortalized on the Blockchain.