work of art
US /wɜːrk əv ɑːrt/
UK /wɜːrk əv ɑːrt/

1.
obra de arte, pieza de arte
an object made by an artist, especially a painting or sculpture
:
•
The Mona Lisa is considered a timeless work of art.
La Mona Lisa es considerada una obra de arte atemporal.
•
Each piece in the exhibition was a true work of art.
Cada pieza de la exposición era una verdadera obra de arte.
2.
obra de arte, obra maestra
something that is made or done with great skill or artistry
:
•
The intricate clockwork was a true work of art.
El intrincado mecanismo de relojería era una verdadera obra de arte.
•
Her baking is always a work of art, both beautiful and delicious.
Su repostería es siempre una obra de arte, hermosa y deliciosa.