Žacléř Castle is located in Žacléř town, within Královéhradecký kraj. This historically significant site evolved from a medieval fortress into a Renaissance castle. Constructed around 1334, it served as a strategic stronghold during various conflicts, including the Hussite Wars. In the 16th century, Kryštof z Gendorfu transformed it into a Renaissance-style residence. Despite suffering damage and looting during the Thirty Years' War, it later became part of Jesuit holdings before passing through several private owners.

The origins of Žacléř Castle date back to the early 14th century, with its first documented mention around 1334 when Pertolt z Lipé pawned it. Historical sources suggest a Bohemian ruler likely founded it at the beginning of the century, although the small size of the initial fortress core does not fully support this claim. By the mid-14th century, Boleslav II., a Swidnica duke, controlled it and used it as a key stronghold until the end of the Hussite Wars.

Architecturally, Žacléř Castle began as a medieval fortress with limited initial size. In 1555, Kryštof z Gendorfu transformed it into a Renaissance-style residence. The structure faced destruction during the Thirty Years' War but was subsequently rebuilt by Jesuits who added baroque elements in the early 18th century. Today, the castle features two to three-story construction with an irregular six-sided layout and a polygonal front on the southern side.

Ownership of Žacléř Castle has changed hands numerous times throughout history. After Pertolt z Lipé pawned it in 1334, notable owners included Jindřich Pfaff, Albrecht z Chřenovic, and Boleslav II. In the mid-15th century, Hanus z Varnsdorfu conducted raids from the castle until Silesian and Lusatian cities purchased it in 1447. The Jesuits acquired it in 1636, influencing its architectural style with baroque elements added between 1730 and 1740. Subsequent owners included Kryštof z Gendorfu, who initiated its transformation into a Renaissance castle, and various private individuals until the 20th century.

Key events at Žacléř Castle include its first documented mention in 1334 and its destruction by forces led by Karel I. Minsterberský in 1523 after raids conducted from the castle. Unlike other strategic sites purchased by Silesian and Lusatian cities in 1447, Žacléř was never destroyed but instead given as collateral to the Liebenthaler brothers.

Today, Žacléř Castle is a cultural monument under private ownership by Castrum Scheczler. Although it remains closed to the public, its rich history and architectural evolution make it a site of interest for those exploring the region's heritage. The castle's strategic past and transformation over centuries highlight its significance in Bohemian history, inviting visitors to appreciate its enduring legacy.

Žacléř Castle stands as a testament to the dynamic history of the region, offering insights into medieval fortifications and Renaissance architecture. Its storied past and architectural transformations make it a compelling destination for those interested in exploring the layers of history embedded within its walls. While currently inaccessible to the public, its historical value continues to captivate historians and enthusiasts alike.