During the first royal dynasty, the Jewish community was large and protected by Portugal's kings. It had its own legislation and administration, generally at the hands of an arrabi, with judicial authority given to an arrabi-mor, elected by the king. Jews lived near Christian communities, although within their own quarters, the Judiarias, and their jobs were fundamental to the city's economy: merchants, doctors, artisans etc. Nonetheless, relations could be fragile, despite royal protection. For example, Fernando I's treasurer was a Jewish man named D. Yuda. When the Pope decreed that all Jewish people should wear distinct garments, it was largely ignored by Portuguese kings, and the measure was only applied in full by Afonso IV, who ordered Jewish people to wear a yellow mark on their hats. Despite protections granted to these communities, by Pedro I's reign, Jewish quarters had become closed in on themselves, with mandatory curfew after sunset. Those who disobeyed risked severe punishment.