Vesterbygaard[a] is a manor house and estate situated north of Tissø, Kalundborg Municipality, some 70 km west of Copenhagen, Denmark.

[2] Denmark's many wars with Sweden throughout the 16th, 17th, and early 18th centuries left the Crown heavily in debt.

In 1664, Gabriel Marselis Jr., a Dutch merchant, received Vesterbygaard and a number of other estates as repayment of the large loans he had made to the king.

He had studied theology at the University of Copenhagen but ended up as president of the Supreme Court.

He had a large collection of books, which was later ceded to the Royal Danish Library where it is still referred to as the Hjelmstierne-Rosencroneske Bogsamling.

He had just inherited a substantial sum of money from his father, a successful silk and textile merchant in Copenhagen.

Vesterbygaard was therefore endowed to her nephew Orla Wulff, who assumed the name Fonnesbech-Wulff.

On his death Vesterbygaard therefore passed to his nephew Henry Emil Fonnesbech-Wulff.

The central part of the main wing is tipped by a triangular pediment on both sides of the building (courtyard and garden).

The three-winged home farm (avlsgården) is situated immediately to the north of the main building.