The Sancti Spiritus University, located in one of the main accesses to Oñati is one of the gems of the civil architecture of the Basque Renaissance. Built in the 16th century ordered by the Bishop Rodrigo Mercado de Zuazola, its facade is very smart and stately. Inside, the cloister and Plateresque retable, carved by the French sculptor Pierres Picart, are outstanding pieces.