The Lwów School of Mathematics was a prominent mathematical community in the early 20th century, centered in the city of Lwów, now known as Lviv in Ukraine. It was known for its innovative approaches to mathematics and for fostering collaboration among mathematicians, including notable figures like Stefan Banach and Hugo Steinhaus. This school significantly contributed to various fields, particularly functional analysis and set theory. The mathematicians of the Lwów School emphasized rigorous proofs and the application of mathematical concepts to real-world problems, leaving a lasting impact on the development of modern mathematics.