The estate was owned by the
Radziwiłł magnate family from 1533, when it was awarded to
Mikołaj Radziwiłł and his brother
Jan Radziwiłł after the extinction of the
Kiszka family. Since the Radziwiłłs were one of the most important and wealthy clans of the
Grand Duchy of Lithuania and the
Crown of the Kingdom of Poland, it was there that the
Lithuanian Metrica was moved in 1551. In 1586 the estate was turned into an
ordynacja. After the
Union of Lublin the castle became one of the most important residences in the central part of the
Polish–Lithuanian Commonwealth. In 1582,
Mikołaj Krzysztof "Sierotka" Radziwiłł, the Marshal of Lithuania,
Voivode of
Trakai–
Vilnius and
castellan of
Šiauliai, started the construction of an imposing square three-storey "
château". Although the works were based on a pre-existing structure of a medieval castle, the former fortifications were entirely turned into a renaissance-baroque house. Construction was completed by 1604, and they added several galleries half a century later. The château's corners were fortified with four octagonal towers. In 1706, during the
Great Northern War,
Charles XII's army sacked the castle and destroyed its fortifications. Several decades later, the Radziwiłłs invited some German and Italian architects to substantially renovate and enlarge the castle.
Antoni Zaleski decorated its yellow facades with baroque
stucco work. The 16th-century castle gates were also reconstructed, and the two-storey gatehouse tower was crowned with a helm. It was at this time that the three separate buildings surrounding the central courtyard were joined into a single structure. During the
Polish–Russian War of 1792, the castle was seized by Russian forces and the Radziwiłł family was expelled. Soon afterwards the Lithuanian Metrica was transferred to
Saint Petersburg (where it still remains today), while the majority of works of art gathered in the palace were distributed among various Russian and Polish nobles in support of
Catherine the Great. Due to the
Second Partition of Poland in 1793, the castle became part of Russia. Abandoned both by the original owners and by the Russian army, the palace gradually fell into disrepair. However, it was restored by the Radziwiłłs and between 1881 and 1886 the castle's interiors were renovated by Prince
Antoni Wilhelm Radziwiłł and his French wife,
Marie de Castellane. They also designed a
landscape park in English style. With an area of more than one square kilometre, the park is one of the biggest such facilities in Europe. After the
Polish–Soviet War the castle complex and the surrounding area became part of the newly established
Second Polish Republic in 1920. During that time, the castle was considered one of the most beautiful in the
Kresy region. During the
invasion of Poland in 1939, the Radziwiłł family was expelled from the castle by the
Red Army. In
Soviet times, the castle was used as a
sanatorium, while the park gradually fell into neglect. The castle complex is considered to be the most beautiful in Belarus. In 2005 it was listed by
UNESCO as a
World Heritage Site. The castle complex was extensively restored from 2004–2012. ==Other Radziwiłł castles==