Adrien Gaston Calley Saint-Paul de Sinçay (9 July 1854 – 19 March 1938) was a Belgian industrialist and equestrian.

[1] Calley Saint-Paul de Sinçay was born in Angleur on 9 July 1854, into a family with French bourgeois roots.

He studied at the Faculty of Law of Paris, graduating in 1879.

Calley Saint-Paul de Sinçay competed in the equestrian mail coach event at the 1900 Summer Olympics.

[3][4] He married a Russian countess, Hélène Bloudoff;[5] they had a daughter: Calley Saint-Paul de Sinçay died in Brussels on 19 March 1938.