it goes southeast, cutting through the Siffin cemetery and passing by the southwest corner of Raqqa/Kallinikos. The settlement of al-Muhtariqa probably began in 785, when the city's governor Ali ibn Sulayman transferred Raqqa's market from Raqqa/Kallinikos to somewhere between it and al-Rafiqah. Before then, this area had been used for agriculture. Later, al-Muhtariqa was expanded when Harun al-Rashid made Raqqa his capital, in order to serve the newly increased demand for luxury and everyday goods. When al-Muhtariqa finally declined and became abandoned is not clear. Physical evidence includes coins, as late as 825-6 at Tall Aswad and 840-1 at Tall Zujaj, and pottery remains, which at both sites include fragments of the so-called "Samarra ware" in the upper layers, so activity at those sites must have continued at least until that period. Based on the account of Ahmad ibn al-Tayyib al-Sarakhsi in the 880s (see below), al-Muhtariqa was probably still active at least until that point. The palace city When Harun al-Rashid made Raqqa his capital, he built a whole "palace city" to the north of the main city. During the 12 years he resided here, it was built up to an area of 15 square kilometers. Like al-Rafiqah, this area has been almost completely obliterated by new housing construction since the late 20th century. Besides palaces and other buildings, this area included irrigation canals and underground watercourses in order to ensure a constant water supply. Many of the palaces were set in large garden enclosures, with wide avenues and racecourses. Toward the end of Harun al-Rashid's reign, this area was also expanded further to the north. The central palace of Harun al-Rashid is located about 1km northeast of al-Rafiqah. Here, a large 340x270m building set in a double garden enclosure probably represents the remains of the Qaṣr as-Salām, or "palace of peace", mentioned in historical sources. This building's original floorplan has been obscured by later construction, but some of its ornate decoration survived to indicate its importance. East of the Qasr as-Salam is a series of three smaller palaces, each one featuring courtyards, triple audience halls, and small private mosques. These were probably the residences of Harun al-Rashid's family members or close associates. A fresco inscription found in the westernmost of these three palaces names the caliph al-Mu'tasim, who was one of Harun al-Rashid's sons; this may date from a later renovation. Just south of the palace with al-Mu'tasim's