Why is shah jahan thought of as the great builder?

We can say it that Shah Jahan was a great builder bcoz he built many beautiful monuments which r vry famous like Taj Mahal, RED FORT etc.....we know Taj Mahal was the seven wonder of the world it was built with pure white marble n in the momory of his beautiful queen Mamtaz Mahal n in dis way Red Fort was also famous in the world...