NBC has given a formal green light to 12-hour miniseries A.D., Mark Burnett and Roma Downey‘s follow-up to their highly rated miniseries The Bible that aired on History earlier this year. The project, produced by LightWorkers Media with Burnett, Downey and Richard Bedser serving as executive producers, is eyeing a premiere in spring 2015. “Last year when Mark Burnett was launching The Bible on cable, I told him, without hesitation, that if he wanted to tell more of the story, we’d love to do it at NBC,” said NBC chairman Robert Greenblatt. “We are firmly in the ‘event’ business and nothing has more event potential than A.D. as it continues immediately after the The Bible ended.” The order for A.D., which will be written by BAFTA nominee Simon Block (The Shooting Of Thomas Hurndall), comes a week after NBC greenlighted its first miniseries under the network’s current longfprm push – the four-hour Rosemary’s Baby. This also marks the second miniseries order for Burnett and Downey in the past week after CBS picked up The Dovekeepers, which also has religious overtones.