Cleopatra (1963) starring Liz Taylor
it's a long one, nearly four hours, and that is still a heavily edited version.
The set and all looks great, and her dresses too. Storywise and actingwise, I didn't like it as much, it's too long winded perhaps.
One guy (Roddy McDowall) was supposed to be running for an Oscar as supporting actor but the movie company accidentally nominated him for the Oscar for main actor which is why he didn't win it. He is really good though.
Interestingly there are currently two movies in production about Cleopatra, one is directed by Denis Villeneuve, the other one is starring and co-written by Gal Gadot