When did Broadway musicals started and which are its greatest musicals?

Question:

When did Broadway musicals started and which are its greatest musicals?

I want to learn about the Braodway musicals history, why they invented the first musical and which are the greatest ones... That's for my music project....

Best Answer - Chosen by Asker: im obsessed with broadway, but if this question is regarding homework, i'm not a cheater so cant help u there