Complex sentence: He took steps towards modernizing and democratizing his dominion, founding the University of Salamanca in 1212 and in 1188 summoning the first parliament reflecting full representation of the citizenry ever seen in Western Europe, the Cortes of León.
Split into simpler sentences: He took steps towards modernizing and democratizing his dominion, founding the University of Salamanca in 1212. And in 1188 summoning the first parliament reflecting full representation of the citizenry ever seen in Western Europe, the Cortes of León.