In this city, an 1888 “Universal Exposition” led to the creation of its Castle of the Three Dragons. This city’s Block of Discord includes a (10[1])building with a roof reminiscent of a dragon’s back nicknamed the House of Bones. In this city, 86 Doric columns support a Greek theater at the top of a staircase featuring an example of trencadis (“trung-kuh-DEES”), a multicolored mosaic salamander. That park in this city, like pavilions that featured a wrought-iron dragon gate, is named for Eusebi (-5[1])Güell (“oh-ZEH-bee GWAIL”). This city hosts an unfinished structure intended to have 18 towers that was primarily designed (10[1])by Antoni (10[1])Gaudí (10[2])(“gow-DEE”). For 10 points, (10[1])the Sagrada Família (10[1])basilica (10[1])is located in what largest Catalonian city? ■END■ (10[1])