For 10 points, name this capital of Bulgaria.
The home to the Ivan Vazov Theatre, it is the capital of a namesake province which is found to the south of Montana province. This city is found just northwest of the Vitosha Mountains and north across the Rila Mountains from Borovets and Moussala. It is the largest city in its country by far, well outpacing Ruse, Sliven, and (*) Plovdiv. For 10 points, name this capital of Bulgaria.
The home to the Ivan Vazov Theatre, it is the capital of a namesake province which is found to the south of Montana province.
Sofia