Risso writes: "In the eleventh century, Saljûq Persia developed at the expense of what was left of Buwayhid Mesopotamia and the Saljûqs controlled ‘Umânî ports from about 1065 to 1140. Fâtimid Egypt attracted trade to the Red Sea route and away from the Persian Gulf. These shifts in power marked the end of the Gulf's heyday, but the island ports of Qays and then the mainland port of Hormoz (at first tributary to Persia) became renowned entrepôts. The Hurmuzî rulers developed Qalhât on the ‘Umânî coast in order to control both sides of the entrance to the Persian Gulf. Later, in 1300, the Hurmuzî merchants cast off Persian overlordship. and reorganized their entrepôt on the island also called Hurmuz and there amassed legendary wealth. The relationship. between the Nabâhina and the Hurmuzîs is obscure".