Charles University, Prague, is a must visit place in Prague as it has the most beautiful and majestic libraries in the world.
Ernst Mach stayed at the Charles University, Prague for 28 years. He was given the chair of Experimental Physics in 1867. Later on, he returned to Vienna.
While working as a full professor at Charles University, Prague, Einstein wrote a total of eleven scientific papers including 5 papers on radiation mathematics and the quantum theory of solids. He became a full professor there in 1911 as he accepted the citizenship of Austria to work there.