 Among these early policies were the elimination of illegal taxes that burdened the merchant community and extensive building and renovation projects for Islam's holiest sites, such as the Prophet's Mosque in Medina, the al-Aqsa Mosque in Jerusalem and the Ibrahimi Mosque in Hebron.Following the détente with the Ilkhanate after 1280, Qalawun launched a wide arrest campaign to eliminate internal dissent, imprisoning dozens of high-ranking emirs in Egypt and Syria.The détente also saw a shift in Qalawun's building activities to focus on more secular and personal purposes, including a large, multi-division hospital complex in Cairo across from the tomb of as-Salih Ayyub.