Complex sentence: Seljuk architecture is the name given to architecture built during the time when the Seljuks ruled most of the Middle East and Anatolia between (11th-13th Centuries).
Split into simpler sentences: Seljuk architecture is the name given to the architecture of the Seljuks. The architecture can be found in the areas where the Seljuks ruled; most of the Middle East and Anatolia between (11th-13th Centuries).