old master

US /ˌoʊld ˈmæs.tər/
UK /ˌoʊld ˈmæs.tər/
"old master" picture
1.

Viejo Maestro

a distinguished European painter of the period from about 1300 to 1800

:
The museum acquired a rare painting by an Old Master.
El museo adquirió una pintura rara de un Viejo Maestro.
She specializes in the restoration of Old Master drawings.
Ella se especializa en la restauración de dibujos de Viejos Maestros.