Tvrz Křepenice, Fortified house in Křepenice, Czech Republic.

Tvrz Křepenice is a water castle in Křepenice featuring a main building surrounded by bastions and protective walls in a rectangular layout. A pond encircles the entire fortified complex, serving both as a defensive barrier and a defining feature of the structure's design.

Jakub Krčín built the Renaissance water fortress in 1584, modelled on the Rožmberk family's Kratochvíle, and named it Nový hrádek Krčínov. He resided there from 1590 to 1597. After 1948 it housed a collective farm, later the local national committee and a youth organisation secretariat; it was restituted in the 1990s.

The fortified residence demonstrates Renaissance defensive thinking through its visible bastions and protective walls that still shape how the complex is perceived today. The layout of buildings and fortifications allows visitors to understand how such structures were designed to protect their inhabitants.

The fortress is privately owned and not open to the general public, so visits must be arranged in advance with the owners. The building stands in the village of Křepenice in the Příbram district, where the former Návesník pond and the stone bridge approach can be seen from outside.

The water surrounding the castle was not merely decorative but an integral part of the 16th-century defensive strategy. This system makes it a noteworthy example of how water technology was applied to create defensive structures of that period.