Royal Collection (Great Britain) (Corporate Name)

Princes as patrons, 1998: t.p. (Royal Collection)

Leonardo da Vinci, 2018, ©2018: page before title page (the Royal Collection) page 6 (Royal Collection at Windsor Castle, UK; Royal Collection Trust)

Royal Collection WWW site, Nov. 26, 2018: (The Royal Collection is one of the largest and most important art collections in the world, and one of the last great European royal collections to remain intact; Royal Collection Trust looks after the Royal Collection, one of the most important art collections in the world, and manages the public opening of the official residences of Her Majesty The Queen; https://www.rct.uk/visit/windsorcastle)