The small but distinctive Temple of St. Christopher (San Cristóbal, 1540). Some of the Spanish soldiers who died in a battle between the two dueling conquistadors, Francisco Pizarro and Diego de Almagro, may be entombed inside, but apparently this isn’t known for certain. You probably have guessed by now that Ayacucho is noted for its many surviving historic churches — 33 is the figure usually given, which I believe includes only the colonial-era ones.