"certain pages of Lohengrin, certain paintings by Carpaccio"
Carpaccio's The Dream of St Ursula
Public DomainCarpaccio's The Dream of St Ursula

Lohengrin is a 1840 opera by Richard Wagner (1813-1883) based on a German Arthurian tale. Proust hugely admired Wagner, and it is thought that the epic scope and length of some of his operas influenced the epic length of Proust's own work. Vittore Carpaccio (c. 1460-c.1525) was a Venetian painter who studied under Bellini.