St. Patrokli is of great example of Romanesque architecture in Westphalia. In 960, Bruno I, Archbishop of Cologne transferred relics of St. Patroclus from Troyes to Soest. Since 964, they have been housed in the church.
The original building, with a monumental westwerk, was completed before 1000. In the first half of the 11th century, the westwerk was rebuilt after a fire. The altar was consecrated on in 1118 and St. Stephen's chapel in 1149. In a further phase of construction a large hall crypt, the apse and a vaulted choir were installed. The Mary choir, the paradise and the East cloister were also built. The nave and the transepts were vaulted and the whole interior received painted decoration. This phase of construction ended in 1166. The western portion of the building was rebuilt from the last quarter of the 12th century and into the 13th century. The old westwerk was made to appear part of the nave by the removal of supports, partitioning, and the installation of new vaulting in the last one and a half bays.
The crypt was blown up in 1817. During an aerial attack in 1944, the north side of the westwerk and vaults were severely damaged. In the aerial attacks of 1945, the organ was destroyed, the apse was obliterated and there was severe damage to the spire and vaulting. The reconstruction began with the laying of the groundstone in 1949. By 1954, a new high altar had been erected, and the vaults and apse had been repainted. The southern cloister and the eastern and southern wings were renovated. The local painter Hans Kaiser created windows for the westwerk and secondary crypt.References:
German crusaders known as the Livonian Brothers of the Sword began construction of the Cēsis castle (Wenden) near the hill fort in 1209. When the castle was enlarged and fortified, it served as the residence for the Order's Master from 1237 till 1561, with periodic interruptions. Its ruins are some of the most majestic castle ruins in the Baltic states. Once the most important castle of the Livonian Order, it was the official residence for the masters of the order.
In 1577, during the Livonian War, the garrison destroyed the castle to prevent it from falling into the control of Ivan the Terrible, who was decisively defeated in the Battle of Wenden (1578).
In 1598 it was incorporated into the Polish-Lithuanian Commonwealth and Wenden Voivodship was created here. In 1620 Wenden was conquered by Sweden. It was rebuilt afterwards, but was destroyed again in 1703 during the Great Northern War by the Russian army and left in a ruined state. Already from the end of the 16th century, the premises of the Order's castle were adjusted to the requirements of the Cēsis Castle estate. When in 1777 the Cēsis Castle estate was obtained by Count Carl Sievers, he had his new residence house built on the site of the eastern block of the castle, joining its end wall with the fortification tower.
Since 1949, the Cēsis History Museum has been located in this New Castle of the Cēsis Castle estate. The front yard of the New Castle is enclosed by a granary and a stable-coach house, which now houses the Exhibition Hall of the Museum. Beside the granary there is the oldest brewery in Latvia, Cēsu alus darītava, which was built in 1878 during the later Count Sievers' time, but its origins date back to the period of the Livonian Order. Further on, the Cēsis Castle park is situated, which was laid out in 1812. The park has the romantic characteristic of that time, with its winding footpaths, exotic plants, and the waters of the pond reflecting the castle's ruins. Nowadays also one of the towers is open for tourists.