Modular Forms, Hecke Eigenvalues, and their Limiting Behavior This course will cover basics about holomorphic modular forms on the full modular surface M = SL(2, Z)\H, and their limiting behavior as the weight tends to +∞. Toward the end of the course, I aim to discuss about equidistribution of Hecke eigenvalues, holomorphic analogue of Quantum Unique Ergodicity, and equidistri- bution of zeros of holomorphic modular form.