Järppilä manor was first mentioned in the 1480s. Bertil Ivarsson Grön acquired Järppilä in 1567 and since him the chain of manor owners is uninterrupted. The manor has been owned by famous Horn and Fleming noble families.
The original main building was a three-storey manor-castle built in the 1570s. It was destroyed in the was between Duke Charles and King of Sweden Sigismund (1597–1599). Today only a small tower remains and is restored as a magazine.
The basement of the present Järppilä manor house was probably built in the 17th century. The empire style building was completed to the present appearance in the 1830s. Järppilä has been held by the current family since 1898. Today it offers event and wedding services.
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.