Kraków is the second largest and one of the oldest cities in Poland. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life and is one of Poland’s most important economic hubs. Developed over many centuries, Kraków provides a showcase setting for many historic styles of architecture. As the city expanded, so too did the architectural achievements of its builders. It is for this reason that the variations in style and urban planning are so easily recognisable.