Jivno, Gothic castle ruin in Lány, Czech Republic

Jivno is a castle ruin with Gothic features located on elevated terrain near Lány. The remaining stone walls display the characteristics of medieval defensive architecture, with fragments that hint at the original structure's layout and construction methods.

No written records survive from the castle's existence; surface finds date its occupation to the 13th–15th centuries, and King Wenceslaus I may have founded it. It was probably a royal castle attached to Křivoklát, perhaps a hunting seat like nearby Jenčov, and likely perished in the Hussite wars. The first written mention is from 1546, when a hermit lived in the ruin.

The ruin appears in Alois Jirásek's novel Mezi proudy I and his comedy Kolébka. Its name is also tied to a hermit who lived in the ruins in 1546, for whom a small chapel and hermitage were built on the site.

The ruin lies inside the Lánská obora game reserve above the Klíčava reservoir, at about 350 m elevation, and is not open to the public. It can only be viewed from outside the reserve; there is no marked trail to the walls and no visitor facilities.

The ruin preserves original Gothic building techniques visible in how the stones were cut and fitted together. Many visitors overlook these construction details, which reveal the skill of the medieval craftsmen who built it.