The church of San Román is probably the best and most complete example of Calceta’s Romanesque style. It consists of a chevet with an apse and a nave divided into three bays. Added to this basic layout is the tower of a fortress converted into a bell tower and a beautiful Renaissance chapel from the 16th century, attached to the north wall of the first section, with a semicircular barrel vault.
Inside the church there are three pairs of double columns supporting sash arches, one of them the triumphal arch, following the Calceat model. The quarter sphere vault of the apse is supported by two rectangular section ribs that, on one side converge in the keystone, while on the other they rest on two columns, which divide the apse into three sections. Each of these sections has a window to illuminate the presbytery.