Abba Kolon is a mythical Roman mentioned in a Talmudic legend concerning the foundation of Rome, which, according to the Haggadah, was a result of the impious conduct of the Jewish kings. According to the legend, the first settlers of Rome found that their huts collapsed as soon as built, whereupon Abba Ḳolon said to them, "Unless you mix water from the Euphrates with your mortar, nothing that you build will stand." Then he offered to supply such water, and for this purpose journeyed through the East as a cooper, and returned with water from the Euphrates in wine-casks. The builders mixed this water with the mortar and built new huts that did not collapse. Hence the proverb, "A city without Abba Ḳolon is not worthy of the name." The newly built city was therefore called "Babylonian Rome".