Let's start at the river, at a point where most people will cross to the - fine - museum (which would be to the right). You see a mosque (a bit in the distance), that commissioned by Abu Al-Feda, whose tomb is there. He was a soldier-turned-poet, also historian, astronomer and botanist and wrote a treatise on geography that was major resource for European cartographers of the Renaissance and on. He was elevated to become emir of Hama in 1320 (says the Lonely Planet Guide), I did not visit it, but it sits picturesquely almost on the side of the river, he himself considered it "one of the most delectable of spots".