The Vattholma ironworks is one of the oldest in Sweden. Smelters are believed to have been active here back as far as the 15th century. Wattholma operated under the Crown until the end of the 16th century. Walloon forging was introduced during the 1600s and was used until the 1870s, when it was replaced by the Lancashire method. Wattholma also featured a blast furnace that was moved in 1758. Bar iron production ceased in 1905, but manufactory smithing and foundry operations continued.
The works were sold in 1939 to a fire appliance store in Stockholm. Housing was added in the 18th and 19th centuries. The old inn with its walled courtyard is found here, along with a storehouse and school. On the opposite side of Fyrisån River is the manorhouse, with its main structure from 1812 and annex from the 1700s. Most of the old buildings were demolished in the early 1970s and replaced with modern residences that resemble the originals.
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.