Philadelphia is a city in Arabia. Today this city is Amman, capital of Jordania. Amman was built about 1500 BC, but this city was destroyed in 8th century BC. Ptolemaios II. built in the same place a city. He called it Philadelphia. Romans conquer this city in year 33 BC and "their king of Judaea" - Herodes - built in Philadelphia amphitheater, temple of Herkules and strong walls. In 637 Moslems took control over the city.
This city has not any water, but I did in the editor two small lakes. You can´t fishing, you can´t grow wheat. But you can have fruit, vegetables, olives, vines and pigs. You must import pottery or clay, ´cause you can´t have clay pits. You can export furniture, oil, etc.
This province has some military activity, but you can´t build forts (cohorts) and military academy. But the attacks are so weak! Several towers, vigils, gladiators and lions can stop the attack.