Stadtpfarrkirche St. Johann church is located next to Rapperswil Castle. The castle and the parish church were built by Count Rudolf II and his son Rudolf III around 1220/29. The former parish church was located at Busskirch on upper Zürichsee lake shore, being one of the oldest churches around the lake area. Even the citizens of Rapperswil had to attend services in Busskirch until Count Rudolf II built his own parish church on he Herrenberg hill next to the castle. Legally, Rapperswil church was subordinated to 1253 the parish of St. Johann Busskirch and thus the Pfäfers abbey. In 1489 the adjacent Liebfrauenkapelle was built, the cemetery chapel that still exists. On 30 January 1881 the church was partially destroyed by fire, and rebuilt from 1881 to 1885.
The Romanesque hall church and the northern church tower were extended in 1383 to the west. In 1441 a smaller but massively southern church tower was built. Collection campaigns in 1493/97 allowed to rebuild the hall church into a tripartite Gothic choir with arched ceiling and tracery windows. Following the Reformation in Switzerland, two Renaissance wing altars in the side chapels were added respectively latter moved to other chappels. Thus, these altars were not destroyed by fire on January 30, 1882, as well as the sacristy located in the southern church tower, along with the precious treasure of the church: masterpieces by the goldsmiths Breny from Rapperswil, Dietrich, Dumeisen and Rüssi Ysenschlegel, being one of the richest in the Linth territory.
References:Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.