Stora Sundby castle was mentioned first time in Middle Ages. In 1364 it was besieged and captured by Albrecht during his battle with Magnus Eriksson. From the end of 1300s to the early 1400s it belonged to Lars Ulfsson Blå. After him Stora Sundby was owned by Julita monastery and families of Natt och Dag, Sparre and Chevron.
The present main house was built by Lars Siggesson Sparre, who asked Carl de Geer to design a new castle on the old Norman style. The casle was finished in 1848. The drawings were made up by the English architect J.F. Robinson. In refurbishment underwent castle a fundamental change in the exterior but the interior remained mainly unchanged. The architecture symbolizes a year calendar: 52 rooms (number of weeks per year), 12 small towers (12 months per year), four large towers (four seasons), 365 windows (days per year).
References:The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.