During the Babylonian period the centre of Judah had shifted northward to Benjamin; this region, once a part of the kingdom of Israel, was far more densely populated than Judah itself, and now held both the administrative capital, Mizpah, and the major religious centre at Bethel.[3] Mizpah continued as the provincial capital for over a century. The position of Jerusalem before the administration moved back from Mizpah is not clear, but from 445 BCE onwards it was once more the main city of Yehud, with walls, a temple (the Second Temple) and other facilities needed to function as a provincial capital, including, from 420 BCE, a local mint striking silver coins.[4]