Tvis Abbey is a former Cistercian abbey founded in 1163 by Prince Buris as a daughter house of Herrevad Abbey in Scania (now in Sweden). The abbey was dissolved during the Reformation, probably in 1547. The abbey church, which served as a parish church, was demolished, apparently in 1698, after which a replacement was set up in the west wing, but that too was demolished after the construction of a new parish church in 1887. Today there are no visible remains apart from the foundations.
References:The church of the former Franciscan monastery was built probably between 1515 and 1520. It is located in the UNESCO World Heritage Site of Old Rauma. The church stands by the small stream of Raumanjoki (Rauma river).
The exact age of the Church of the Holy Cross is unknown, but it was built to serve as the monastery church of the Rauma Franciscan Friary. The monastery had been established in the early 15th century and a wooden church was built on this location around the year 1420.
The Church of the Holy Cross served the monastery until 1538, when it was abandoned for a hundred years as the Franciscan friary was disbanded in the Swedish Reformation. The church was re-established as a Lutheran church in 1640, when the nearby Church of the Holy Trinity was destroyed by fire.
The choir of the two-aisle grey granite church features medieval murals and frescoes. The white steeple of the church was built in 1816 and has served as a landmark for seafarers.