[1] Oral tradition and chronicles of 1371 suggests that the chapel was constructed by regal initiative (by King D. Fernando), but was completed by the Condestável D. Nuno Álvares Pereira, master of the town of Estremoz.

[1] The triangular frontispiece with cornice, corresponds to the purest canons of the Gothic monastic tradition, with many of elements stolen in the 17th century, replacing the Rosácea with a simple rectangular window.

[1] The nave's front porch, a forced narthex, perhaps used the palatial building nearby, and includes three sections of Tuscan colonnade on high plinths, raising an ashlar architrave.

[1] A similar portico framed by chamfered ashlar and flanked by tile is located in the lateral southern facade.

In this context, it represents a long tradition of early medieval Portuguese architecture, namely the expansive volume typical from the 18th century.