The ruins of the Monastery of Santa Clara-a-Velha (Old St. Clare) are located in the city of Coimbra, in Portugal. The monastery was built in the 14th century on the left bank of the Mondego River, but had to be abandoned in the 17th century due to frequent floods. The well-preserved Gothic ruins of the monastery were excavated in the late 20th century, more than 300 years after being abandoned by the nuns.
The ruined church recently reopened to the public after 12 years of restorations with a new visitor center.
The Monastery of Santa Clara of Coimbra was founded in the 1280s by Mor Dias as a house of the Order of the Poor Clares. This early monastery was dissolved in 1311, but in 1314 it was refounded by Queen Elizabeth, wife of King Denis of Portugal. Elizabeth was admired for her pious and charitable nature, and her devotion led to her canonisation in 1626. The palace of the Queen, of which only ruins remain, was located near the monastery.
The works sponsored by the Queen started in 1316 on the same spot of the previous foundation and gave rise to the ensemble that exists today. The first architect associated with the monastery was Domingos Domingues, who had worked on the cloisters of the Monastery of Alcobaça. His work was continued after 1326 by Estêvão Domingues, who had worked on the cloisters of Lisbon Cathedral. The church was consecrated in 1330 and shows the influence of the Alcobaça building in its floorplan and many other architectural details. Elizabeth died in 1336 and was buried in the monastery in an impressive Gothic tomb. A large cloister was built to the south side of the church within the same 14th century.
Already in 1331 the monastery and church had been flooded by the nearby Mondego River. The site of the foundation proved to be unsuitable, as the monastery was repeatedly invaded by the waters of the river in the following centuries. The nuns of the monastery responded by elevating the floor levels of the monastic buildings to reduce the damage caused by the floods. In spite of the problems, the monastery was frequently enriched by donations. In the early 16th century, under King Manuel I, the church was decorated with Sevillian tiles and several painted altarpieces.