Artists painting on canvas, clowns making balloon animals, street performers and jazz musicians are among the free entertainment to be found in Jackson Square, a one-block section of the French Quarter anchored by a lush green space with benches set amid gardens and grand oak trees. The square is bordered by pedestrian-only walkways with restaurants, storefronts and upper-level balconies boasting decorative ironwork. Benches allow visitors to take in the architecture of the square’s historic buildings, including the Cabildo and Pontalba Apartments, believed to be among the oldest apartment buildings in the country. Visitors are also welcome at St. Louis Cathedral, a place of worship for Catholics since the 1720s. Its towering white facade with three steeples fronts the Mississippi River. Inside are religious mosaics, colorful stained glass and a small gift shop. Masses are held daily and free concerts are held regularly, http://www.jackson-square.com/ and http://stlouiscathedral.org/ .