For 10 points, name this autonomous region of Spain whose largest city is Barcelona.
On April 23, lovers in the four provinces of this region celebrate a holiday in which men give women roses in exchange for books. Some of this region's 7.5 million residents claim to inherit a type of commonsense wisdom called seny. A cultural institution in this region was founded by a Swiss merchant known in Zürich as Hans Gamper. A Benedictine abbey in a mountainous area of this region is the site of a black Madonna nicknamed "la Moreneta" (mor-ay-NAY-tah). Montserrat Abbey is located in this region, which celebrates St. Jordi's Day and has a yellow-and-red striped ̘ag called the Senyera. The largest city in this region hosted the 1992 Summer Olympics and contains Park Güell (gway) and the Sagrada Familia. For 10 points, name this autonomous region of Spain whose largest city is Barcelona.
On April 23, lovers in the four provinces of this region celebrate a holiday in which men give women roses in exchange for books.
Catalonia [or Catalunya; or Cataluña]