Paul Collaer (8 June 1891 – 10 December 1989) was a Belgian musicologist, pianist, and conductor of Flemish background who was born in Boom and died in Brussels.
From 1911, encouraged by his piano teacher Émile Bosquet, who was an early music lover, Collaer gave a dozen lecture-recitals focused on that repertoire.
During the War, he was drafted and assigned to a surveillance position on the Yser river, but he developed pneumonia and was evacuated to Davos in 1917.
There he met Ferruccio Busoni and Karol Szymanowski, played chamber music with the Rosé Quartet and accompanied the violinist Joseph Szigeti.
The new programs featured more contemporary music, including works by Francis Poulenc, Darius Milhaud, Georges Auric, Maurice Delage, and Igor Stravinski.