Čejchanův Hrádek, Castle ruin in Komorní Hrádek, Czech Republic

Čejchanův Hrádek is a Gothic castle ruin perched on a rocky outcrop above the Sázava River. The remains display medieval fortification features including partial stone walls and gate structures built into the hillside.

The castle was first mentioned in writing in 1318, when Ondřej z Hrádku is named. From 1356 it took its name from another owner, Čejchan z Hrádku, and stayed with the lords of Hrádek until the early 15th century, when the robber knight Jan Zoul z Ostředka held it. In 1404 a provincial levy led by Zbyněk Zajíc z Hazmburka besieged and took it; the castle was then demolished and never rebuilt.

The castle's two names come from its owners: Hrádek from Ondřej z Hrádku, documented in 1318, and Čejchanov from Čejchan z Hrádku, in use from 1356. The site has been protected as a cultural monument since 1965, though only terrain relics and small fragments of masonry remain.

No marked hiking trail leads directly to the castle site. Access is by road II/109 from the settlement of Naháč, where it connects to exits from the D1 motorway; Komorní Hrádek chateau stands nearby. The terrain around the ruins is uneven.

The castle's position was poorly chosen: the ridge slopes down toward the valley near Komorní Hrádek, leaving the site exposed. The 1404 siege was led by Zbyněk Zajíc z Hazmburka with a provincial levy, not royal troops, and the castle was demolished afterward.