Archaeologists just dug up an 1,800-year-old Roman watchtower in Croatia, built to guard the empire’s border during Marcus Aurelius’ reign. This thing had deep ditches, a wooden palisade, and killer views over the Danube—perfect for spotting invaders. They even found military gear and brooches! Turns out, the Romans were serious about border security. Next up: researchers are checking if it turned into a full-on fort in the 4th century. Ancient secrets, unlocked! #History #Archaeology #RomanEmpire