Pictures gallery from the film:   Spartacus (1960)
 

Director: Stanley Kubrick
Dir Photography: Russell Metty
Art Direction: Alexander Golitzen
Matte painting: Peter Ellenshaw
 
 
 

Altought there are other matte paintings  at "Spartacus", Peter Ellenshaw only was responsible for one of them,  the wide view of ancient Rome.
The rest oh the paintings,  were painted probably by Russell Lawson who was head of matte department at Universal.
 

The painting.

Peter Ellenshaw with the painting.