The oldest organ in Castile still in use Monument · Covarrubias, Arlanza, Burgos Image of Covarrubias, not of the place itself. The collegiate church of San Cosme and San Damián, of the fifteenth century, preserves a seventeenth-century organ still in use. The ensemble is completed by a sixteenth-century cloister, Baroque altarpieces and a parish museum with Romanesque capitals. Photo: B25es (CC BY-SA 3.0) What to see and do in Covarrubias