Casal Rotondo is the largest tomb on the Appian Way, to the southeast of Rome, Italy. A small farmhouse has been constructed on the top.The structure is found at approximately the VIth mile of the ancient Appian Way. The name comes from the fact that the tomb is round and because a farmhouse (casale) was built on the top in the Middle Ages, when it belonged to the Savelli family and was one of a system of watchtowers along the Appian Way.