Where did Albert Einstein study math?

I'm curious to know where the brilliant mind of Albert Einstein honed his skills in mathematics. Was it at a prestigious university known for its rigorous math programs? Or perhaps he pursued his studies in a lesser-known institution that nonetheless provided him with the foundation he needed to excel in his field? It's fascinating to consider the educational path that led to Einstein's groundbreaking discoveries in physics, and I'm eager to learn more about the mathematical background that played such a crucial role in shaping his genius.