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When the original palace burned down in the 19th century, Antoni Gaudí was commissioned to design its replacement, and work began in 1890. It's a pseudo-medieval (almost Disney) castle in grey granite, but unfinished at the death of its sponsoring bishop, whereupon Gaudí fell out with the town council and stomped off the job. Completed in 1915, it now hosts a museum about the pilgrimage route.
Catedral de Santa María
The cathedral was built in fits and starts from 1471, so to its original Gothic design were added the neoclassical cloister, the Baroque towers and Renaissance portico and high altar.
Showing the city's chocolate-making from medieval times to the present, with old machinery. Signage is only in Spanish.