Passage: Casa Milà (Catalan pronunciation: [ˈkazə miˈla], Spanish pronunciation: [ˈkasa miˈla]), popularly known as La Pedrera (pronounced [ɫə pəˈðɾeɾə]) or "The stone quarry", a reference to its unconventional rough-hewn appearance, is a modernist building in Barcelona, Catalonia, Spain. It was the last private residence designed by architect Antoni Gaudí and was built between 1906 and 1912.

Question: Who was the architect of the private residence?
Antoni Gaudí