The Sestius amphoras, because of their number and variety and the questions they suggest about Roman trade, are increasingly a matter for discussion. The following article first summarizes the work done on the subject since 1952 and then reviews the evided with the early Latin colony on the hill above in 273 B.C., is the earliest Roman harbor thus far known. The remains of the port are described along with its concrete masonry piers which probably date from the late 2nd or early 1st century B.C., supplying the earliest dated evidence for the use of tufo and pozzolana concrete in water.