Kario Salem is developing a miniseries about the Third Crusade for HBO.

The show will focus on the 12th century clash between Islam and Christianity, told through the eyes of their respective leaders, Saladin and Richard the Lionheart, says The Hollywood Reporter.

Salem is writing the first four hours of the 8-hour miniseries; he'll also direct at least one of the episodes. Don McPherson is writing the final four.