I was excited to see this article featuring Blenheim Palace in the June issue of Vanity Fair. There is only a teaser online, so hopefully you have a subscription to the print edition. Always love when I see 18th Century related articles!
I saw a pair of Pier Glass Mirrors last year that are believed to have been from Blenheim Palace.
Also check out this promotional video and website.
Pair of Pier Glass Mirrors
(I was so in awe of these mirrors that I didn’t get a proper picture of them in all their grandeur.) You can see in the reflection Perseus Rescuing Andromeda from the Sea Monster
“It is believed these mirrors were designed to hang between windows in Blenheim Palace, the largest private residence in the world, and the birthplace of Sir Winston Churchill. The palace was built for the First Duke of Marlborough as reward for military service and victory at the battle of Blenheim in 1704 - a gift from a grateful Queen Anne. The mirrors are of ornately carved wood, lavishly covered with gold leaf. They have been attributed to various makers: James Moore, Grinling Gibbons (master carver to the king), and chief architect James Vanbrugh.
During the late nineteenth century, the Eighth Duke of Marlborough sold these mirrors, as well as furnishings and paintings, to raise funds for agricultural experiments and farm improvements.” - seen at MoFA
18thCenturyHistory.com is a source of anything and everything related to the 18th Century. The humanities (art, music, fashion) are what fill most of the posts; but you'll also find plenty of dates, facts, and other random bits of information.
