Monastery of Santa Maria de Maceira Dão, Medieval monastery in Fornos de Maceira Dão, Portugal.

The Monastery of Santa Maria de Maceira Dão is a former Cistercian monastery set in the rural valley near Fornos de Maceira Dão, built from limestone and granite stone. Its church features an elliptical nave within a rectangular ground plan, with a main portico serving as the primary architectural focal point.

The monastery was founded in 1173 and joined the Cistercian Order under Alcobaça authority in 1188. It underwent major rebuilding work starting in 1613, marking a significant transformation of its structures.

The monastery's name comes from the Maceira Dão valley where Cistercian monks settled in 1173. By 1320 it held 1,600 properties, including farms, vineyards, cellars, mills, orchards and olive groves, 485 of them in Mangualde. The refectory, kitchen and cellar on the ground floor of the 18th-century wing recall the community's daily routine.

The monastery stands in the hamlet of Vila Garcia, in the parish of Fornos de Maceira Dão, Mangualde, reached by secondary roads from the town. The 2020–2023 works added new window frames and consolidated the cloister arcades and the rear of the chancel. The church and cloister are now open again following the 16 December 2023 reopening.

The church front is a curved cylinder-shaped facade with the royal arms above the entrance, rebuilt from 1744 under a contract worth 6.100$000 réis. The medieval tower, raised between the 12th and 15th centuries, held a cellar and granary on three internal floors and still stands relatively well preserved.