La corona partida

This is an important story and the costumes are nice, but, honestly, this film seems a period soap opera: the are to many dialogues and few events, frames are mostly upper-body television ones, acting is melodramatic or shallow. With a somewhat similar historic object (King Ferdinand of Aragon does not appear as a core character as here), Spanish cinema made a by far much better film, which I strongly recommend instead: "Juana la Loca" (a.k.a. "Mad Love").