“Bonnie & Clyde” executive producers Craig Zadan and Neil Meron are working on a new four-hour miniseries for History, reports Deadline.com.

History has bought a script for the project, which will look at the beginnings of the medieval Christian order the Knights Templar, the story says.

The project is written by Oscar nominee Kier Pearson, with a focus on three brothers who join the first Crusade. Zadan and Meron will executive produce.