Famous Unintended Lean: Construction began in 1173, but the tower started to lean during building due to soft, unstable ground on one side.
Architectural Purpose: It was built as a freestanding bell tower (campanile) for the adjacent Cathedral of Pisa in the Square of Miracles (Piazza dei Miracoli).
Dimensions: It stands roughly 56 meters (183 feet) tall with eight stories, featuring classic Romanesque marble architecture.
UNESCO World Heritage Site: It is recognized globally as one of the world's most famous architectural wonders and major tourist attractions.
Read next