The era of Laodicea was home to several notable structures, including a large stadium nearly 355 meters long and 65 meters wide that was once one of the most important in antiquity. Ruins also remain of an odeon, gymnasium, and necropolis containing mausoleums. The Council of Laodicea decreed in cannon 29 that Christians must not observe the Sabbath like Jews but rather work and honor the Lord's Day, with judaizers facing excommunication.