Here are my ideas for Seljuq Dynasty,their leader is Alp Arslan,their UB is Madrasah,replaces university but costs a bit more to build,comes with %10 more faith and instead of jungle it gives +2 science per desert and their UA,their caravans can't be destroyed by barbarians or enemy players but it costs let's say %25 more to build and their unique tile improvement is iqta,you can only build it near water source(lake,river) and it covers 1 land unit's upkeep.Numbers can be changed for balance purposes of course.