Antoni Gaudí was a famous Spanish architect best known for designing Casa Batlló, a building in Barcelona featuring an unusual skeletal facade. Some key facts about Gaudí are that he had a strong sense of geometry and volume in his designs, worked his way up from drafting for other architects, and is most renowned for his work on the Sagrada Família basilica, where he died after being struck by a streetcar in 1926 at age 73 while dressed like a homeless person.