The church, of very small dimensions (6 m. X 12 m.), is nevertheless of excellent workmanship. The building is generated by the juxtaposition of two cubes with cross vaults and an apse with a semicatino vault. According to Raffaello Delogu, the construction scheme is based on the duplication of a Lombard span, as already happened in the palatine chapel of Santa Maria del Regno in Ardara and in the church of San Nicola di Silanis in Sedini.[3]
The interior has cross vaults and several frescoes. Near the church there was also a convent, of which only ruins remain,where the homonymous condaghe was compiled. That condaghe is a valuable source for medieval Sardinian history.
Notes
^R. Delogu, L'architettura del medioevo in Sardegna, Roma, 1953, p.110
^Andrea Pala, Il documento di donazione della chiesa di San Nicola di Trullas (Semestene), in Medioevo: i committenti. Atti del Convegno internazionale di studi, (Parma, 21-26 settembre 2010), Electa, 2011 ISBN 8837088752 pp. 329-338