Druids “are engaged in things sacred, conduct the public and the private sacrifices, and interpret all matters of religion,” wrote Julius Caesar in the 50s B.C., after Rome invaded Gaul ...

Julius Caesar, who conquered Gaul in 58 B.C. to 50 B.C. and invaded Britain in 55 B.C. and 54 B.C., is among the principal sources of information about druids.

Roman records after Julius Caesar tells us that the Emperor Tiberius (A.D 14-37) banned all druidic practices, including fortune telling and human sacrifice, throughout the empire.