As the Middle English–speaking Anglo-Saxons were unable to pronounce the name, they preferred to call it "Beaver Castle" – a usage which persists today.

[10] It was built on the land of Robert de Todeni, mentioned in the Domesday Book of 1086, and inherited from him by William d'Aubigny.

[15] In the early 17th century, servants Joan, Margaret and Phillipa Flower were accused of murdering the 6th Earl's two young sons by witchcraft.

Belvoir Castle has been the home of the Manners family for five hundred years and seat of the Dukes of Rutland for over three centuries.

The new Duchess of Rutland soon chose architect James Wyatt to rebuild the castle in the romantic Gothic Revival style.

The Duke, one of the wealthiest landholders in the United Kingdom of Great Britain and Ireland, sold seven assorted villages and their surrounding lands to fund the massive project.

[17] The loss - including pictures by Titian, Rubens, van Dyck, and Reynolds - was estimated at £120,000 (£11.6 million today).

Whilst visiting Belvoir castle in the 1840s, Anna, Duchess of Bedford, found that the normal time for dinner was between 7:00 and 8:30 p.m. An extra meal called luncheon had been created to fill the midday gap between breakfast and dinner, but as this new meal was very light, the long afternoon with no refreshment at all left people feeling hungry.

The Duchess found taking an afternoon snack to be such a perfect refreshment that she soon began inviting her friends to join her.

The traditional burial place of the Manners family was St Mary the Virgin's Church, Bottesford, which houses the monuments of all eight Earls of Rutland.

The mausoleum at Belvoir Castle was built by The 5th Duke of Rutland, following the death of his wife, Elizabeth Howard (1780–1825), daughter of The 5th Earl of Carlisle.

After its construction, most of the 18th century monuments in Bottesford church were moved to the mausoleum which then became the family's main place of burial.

[25] Each year since 2013 (with the exception of 2020 due to Covid restrictions), over the autumnal equinox the Equinox24, a 24-hour ultra marathon, has been held, with runners covering a 10-kilometre (6.2 mi) circuit through the country estate, with the castle as a backdrop.

[27] In August 2010, the castle's website was mistakenly hacked and taken over by an Algerian group who blanked the pages and inserted anti-Semitic texts in Arabic.