Hidden in plain sight throughout downtown blocks is essentially an open-air gallery of enormous sculptures, mosaics, and murals. The public works of art were created by some of the world’s most famous artists in the last century including Picasso, Calder, Miró, and Chagall.

From the plazas in front of Chicago’s civic buildings to pockets spaces in the Loop’s skyscraper canyons and the iconic green space in Grant Park—these cultural attractions can be easily discovered on foot. Whether you work in the Loop or are touring the Windy City, you’ll get to experience pieces of public art that hold the legacy and history of Chicago.

Here’s are 15 pieces of important downtown public art that every Chicagoan, and visitor, should know.