Visit several of the most influential basilicas such as st mary major and st john lateran and discover just how important they were in shaping the history of christianity with your professional guide roam some of the most secluded corners of the city learn about early christian cemeteries and shelters while within the catacombs of either san callixto or santa domitilla gain a better understanding as to why rome is recognized worldwide as the center of christianity on this three hour walki