Rosenfeldt estate was founded by Baron Reinhard von Iselin, a prosperous, Swiss-born landowner, who in 1774 acquired the land when the Crown sold Vordingborg Cavalry District by auction. From 1776 to 1777 he constructed a large farm complex around an octagonal courtyard with the assistance of the architect Christian Joseph Zuber. Iselin's daughter, Anna Elizabeth, inherited Rosenfeldt in 1781. In 1777 she had married the French-born nobleman Antoine de Bosc de la Calmette who in 1783 was appointed prefect of Møn where he owned Marienborg and founded the Liselund estate which he named after his wife.
In 1844 the estate was acquired by captain, general-major Oscar O´Neill Oxholm (1809-1871) who took up residency there with his Irish wife Adelaide Maria O´Kelly. Oxholm constructed the new main building, two farm buildings and 20 fæstegårde. Designed by Henrik Steffens Sibbern, the main building was built from 1868 to 1870. Rosenfeldt Manor is still owned by the Oxholm/Oxholm Tillischs family and covers 2,313 hectares
Rosenfeldt's buildings are arranged around seven of eight sides of Zuber's octagonal courtyard, a layout which is remniscient of that of Amalienborg in Copenhagen. Zuber's original farm complex consists of four low pavilions and two tall stable buildings in Neoclassical style. The plan also reserved a site for the main building which was not built until 1870. Sibbern's main building is constructed in red brick and designed in a Neo-Renaissance style. It consists of a two-story main wing with a tower flanked by two short lateral wings.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.