Page 380. " what an odd idea of hers to go to the Chat Noir afterwards "
Steinlein's famous Chat Noir poster
Public DomainSteinlein's famous Chat Noir poster
The Musée Grévin is a waxwork museum in Paris along the lines of Madame Tussaud's in London. The Chat Noir was a famous nineteenth century cabaret in Montmartre, immortalised in Theophile Steinlein's poster.
Page 390. " as if it had been the Massacre of the Innocents "

Rubens' second Massacre of the Innocents
Public DomainRubens' second Massacre of the Innocents
The Massacre of the Innocents was painted twice by the Flemish artist Peter Paul Rubens (1577-1640), once in c.1611-12 and once in 1636-38. The earlier version was lost in the eighteenth century and only rediscovered in 2001; therefore Swann is probably thinking of the later one.

Page 390. " in the reredos of San Zeno and the frescoes of the Eremitani "

Mantegna's altarpiece at San Zeno
Public DomainMantegna's altarpiece at San Zeno
These are works by Andrea Mantegna (c. 1431-1506), an Italian Renaissance painter, the son-in-law of Jacopo Bellini.

Page 391. " a gigantic usher, dressed in Swiss Guard fashion "
Swiss Guards
Creative Commons Attribution Share AlikeSwiss Guards - Credit: Arnaud Gaillard
The Swiss Guards are the traditional guards of the Pope, and can be seen on duty in the Vatican. Their uniform was designed by Michelangelo.
Page 392. " like a Goya sacristan "

Goya, Self Portrait
Public DomainGoya, Self Portrait
Francisco José de Goya y Lucientes (1746-1828) was a Spanish artist whose work spans the transition from the 'Old Masters' to the modern era of painting.

Page 392. " like some priceless effigy by Benvenuto Cellini "
Cellini's Perseus
Public DomainCellini's Perseus
Benvenuto Cellini (1500-1571) was an Italian artist, known primarily as a goldsmith. He worked in France for Francis I, and wrote an autobiography which is considered a classic, and is still in print today.
Page 392. " the Aubusson tapestries "
Apollo's Education, an Aubusson tapestry
Public DomainApollo's Education, an Aubusson tapestry

Aubusson is a town in Central France, in the Limousin region which, from the fourteenth century onwards, became famous for producing tapestries.

Page 394. " an air from Orfeo "

L'Orfeo is one of the earliest operas. It was written by Claudio Monteverdi (1567 -1643) in around 1607.

Page 395. " Liszt's Saint Francis preaching to the birds "

The Hungarian composer Franz Liszt (1811-1886) wrote Saint Francis Preaching to the Birds in 1880.