[upbeat music] - chicago's a pilsen neighborhoode is known for its art, thanks to the mexican americans who painted murals all over this barrio starting back in the 1960s. before long, pilsen became hip and the property values then went up and so did the rent. over the last 20 years, thousands of mexican americans have had to move out. gentrification strikes again. but the murals they left behind continue to tell their stories, and mario, a tour guide from the national museum of mexican art, knows what's up. how are you doing? - hey, john, how are you? - so you're an expert on pilsen murals? - i like to believe i know a little bit. - [laughs] - mario grew up in pilsen and has been fighting every day to preserve the heritage of this community. - we have a lot of public art here in pilsen, murals that deal with social issues such as violence, but also celebrate the heritage of méxicanos. so this first mural was done by an artist named héctor duarte, and it's painted on his actual house. - oh, that's his house. - the artist lives here.