Archbishop Fonseca's prison Curiosity · Vimianzo, Terra de Soneira, A Coruña Image of Vimianzo, not of the place itself. In 1465 Bernal Sánchez de Moscoso shut the archbishop of Compostela, Alonso de Fonseca II, up in the castle of Vimianzo, where he spent two years a prisoner in a cage that popular legend chose to make of gold. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Vimianzo