In 1274 Pope Gregory X convened the Second Council of Lyon. Abaqa sent a delegation of 13 to 16 Mongols to the Council, which created a great stir, particularly when three of their members underwent a public baptism. Abaqa's Latin secretary Rychaldus delivered a report to the Council which outlined previous European-Ilkhanid relations under Abaqa's father, Hulagu, affirming that after Hulagu had welcomed Christian ambassadors to his court, he had agreed to exempt Latin Christians from taxes and charges, in exchange for their prayers for the Khan. According to Rychaldus, Hulagu had also prohibited the molestation of Frank establishments, and had committed to return Jerusalem to the Franks. Rychaldus assured the assembly that even after Hulagu's death, his son Abaqa was still determined to drive the Mamluks from Syria.