- A former place of amusement in London, on a site that nowforms part of the grounds of Chelsea Hospital. It was named afterRichard Jones, 1st Earl of Ranelagh, who built a house and laid outgardens here in 1689. From 1742 to 1803, Ranelagh was famous forits masquerades, musical entertainments, etc. A notable feature was the Rotunda, built in the rococo style in the 1740s. There was also a Chinese pavilion in the centre of a lake. see also Cremorne Gardens; Vauxhall Gardens.