Twitter's Market Square (former headquarters)

1355 Market Street served as Twitter's headquarters during its rapid growth in the 2010s. The company became closely associated with internet culture and memes, including the 'Fail Whale' illustration that was used by Twitter during service outages and became an early internet meme. The Market Square building and the large blue bird logo on its exterior were widely photographed and shared online, making the site recognizable in tech and social media coverage.