The Dominican convent of San Juan was founded and endowed in the 1370s by Fernán Pérez de Ayala [d. 1385], who also left some ceremonial vestments to the church. His son Pedro López de Ayala [1332-1407], a celebrated general, poet, historian, and chancellor, built the convent's tower chapel of La Virgen del Cabello (where he placed a sculptured tomb for himself and his wife, and donated an altarpiece dated 1396, now at the Art Institute of Chicago). Pedro's son, Fernán Pérez de Ayala [d. 1436], an ambassador of Castille, also built a tomb for himself and his wife in the convent church and founded an altar of Saint Michael in the church. The church underwent renovations in the 1730s.
Bibliography
1983
Portilla, Micaela J. Quejana, solar de los Ayala. Vitoria, Spain, 1983.