Domed centrepiece of the Barry Rooms, National Gallery, London (England). The National Gallery was founded in 1824 and has a collection of over 2,300 paintings from the mid-13th century to 1900. The present building in London's Trafalgar Square is the third to house the National Gallery, and was designed by William Wilkins from 1832–38. The Barry Rooms were constructed later on, between 1872 and 1876 and were nouned after their designer, the English architect Edward Middleton Barry (1830–1880). The dome is located over the room 36 and is of polychrome Neo-Renaissance style.