Spoiler : Capital was Tarsos (captured from Rebels on my 2nd turn), let Antioch flip to me later. Still called Principality of Antioch though. Razed Sis and founded Coxon, then later Limassol on Cyprus and Hisn Kayfa in upper Jazira after the Zengid spawn. First vassal was Zengids, then Seljuk Sultanate and then Kingdom of Kartli. Kartli was a Byzantine vassal until Byzantium declared war on me, then once I razed Trapezounta Kartli broke free. I conquered the four closest Georgian cities and then Kartli capitulated. I had to bribe the Zengids to adopt Catholicism to get the URV condition. Zengids promptly collapsed thereafter, but they had played their part. Surviving against Byzantine attacks was far harder than capturing Jerulsalem, and significantly delayed any moves to the south with my best units. It was only after the Mamluk spawn that I had Byzantium (and the Mongols) under control sufficiently to launch an attack on Jerusalem. For the spreading of Catholicism, I infiltrated most of the Georgian cities peacefully, persecuted Othodoxy from most of my own cities and lastly used a Great Saint based near Tarsus to convert a bunch of Byzantine cities to Catholicism. I specifically razed the small pathetic cities in the Seljuk Sultanate of Rum's spawn zone before using the Great Saint. I think the Great Saint pushed % Catholicism/Orthodoxy from 87%/100% to 106%/100%. I started with one Christian relic in Antioch, caputed one from the Seljuk Sulunate of Rum's capital, traded one from the Abbassids and traded a surplus one from the Ayyubids (after I had already captured Jerusalem).