During the period of 561–527 BC, "Athens itself was becoming more of a city, rather than an agglomeration of villages" Athens had always struggled with its water supply. This was greatly improved during the rule of Peisistratos through the construction of an aqueduct. The market in Athens prior to Peisistratos was disorderly and inefficient. He improved this by reconstructing the market to be laid out systematically to improve the effectiveness and use of space. Peisistratos also began the construction of a Temple to Zeus. Despite his efforts he was unable to complete the construction, and the temple was finally completed during the Roman era by Roman emperor Hadrian.