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 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. (10[1])That park in this (10[1])city, like pavilions that featured a wrought-iron dragon gate, is named for Eusebi Güell (“oh-ZEH-bee GWAIL”). This city hosts an unfinished structure (10[1])intended to have 18 towers that was primarily designed by Antoni Gaudí (“gow-DEE”). For 10 points, (10[1])the Sagrada Família basilica is located in what largest Catalonian city? ■END■