I Mongoli (aka The Mongols) (1961)

Set in the 13th century, Poland sends an emissary (Franco Silva) to Genghis Khan (Roldano Lupi) to negotiate for peace. But Khan's bloodthirsty son (Jack Palance overacting terribly) is against any peace in his ambitious plan for world conquest. Directed by Andre De Toth (HOUSE OF WAX). De Toth was another European emigre to Hollywood where he worked from 1942 to 1960 before returning to Europe. THE MONGOLS was the second movie he made upon his return to Europe. It's an overlong wannabe epic balancing two storylines, Silva's emissary which includes a romance with a peasant girl (Antonella Lualdi) and Palance's psychotic warmonger and his voluptuous companion (Anita Ekberg) in death and destruction. The entire movie drags except for the scenes involving Anita Ekberg as the wicked consort of Palance. With Gianni Garko and Gabriele Antonini.