In this city, an 1888 “Universal Exposition” led to the creation of its Castle of the Three Dragons. (10[1])This city’s Block of Discord includes a building with a roof reminiscent of a dragon’s back (-5[1])nicknamed the (10[1])House of Bones. (10[1])In this city, 86 Doric (10[1])columns support a Greek theater at the top of a staircase (-5[1])featuring an example of trencadis (“trung-kuh-DEES”), a multicolored mosaic salamander. That park in this (-5[1])city, like pavilions (10[1])that featured a wrought-iron dragon gate, is named for Eusebi Güell (10[1])(“oh-ZEH-bee GWAIL”). This city hosts an unfinished structure intended to have 18 towers that was primarily (10[1])designed by Antoni Gaudí (“gow-DEE”). For 10 points, the Sagrada Família basilica is located in what largest Catalonian city? ■END■ (10[3])