 Complete the following phrase:  Raqqa experienced a second blossoming, based on agriculture and industrial production, during the Zangid and Ayyubid dynasties during the 12th and the first half of the 13th century. The blue-glazed Raqqa ware dates from this time. The still-visible Bāb Baghdād Baghdad Gate and the Qasr al-Banāt Castle of the Ladies are notable buildings of the period. The famous ruler Imād ad-Dīn Zangī, who was killed in 1146, was initially buried in Raqqa, which was destroyed during the 1260s 