Drawing: Part 1

I went to the Praça da Liberdade - liberty square - yesterday, here in Belo Horizonte, in order to draw this. A gift for my boyfriend!
He asked me for a picture of one of the Niemeyer's famous buildings. It's not finished yet, but It'll be soon.
Oscar Niemeyer is a known brazilian architect, representative of the Modern Movement. Nowadays, his architecture is way too worthless - my opinion -, but there are many of his earlier works here that worth a visit.
By the way, I study Architecture and Urbanism.