The city of Brownsville, located on the southernmost tip of Texas, was established in 1848 as a military fort strategically located at the mouth of the Rio Grande River. Originally built in 1850, the historic Market Square in Brownsville opened as an open-air market in 1852. As Brownsville continued to grow, Market Square became a hub of fresh foods and street vending during the nineteenth century. With the first floor used as a market hall and city offices on the second, the building operated at the nexus of an agora of democracy for the growing metropolis of the Rio Grande Valley. As the twentieth century emerged, trends of automobile dependency and suburbanization significantly impacted urban life at the core of the city, and Market Square closed to the public in the 1940s only to be turned into a city bus station in the 1980s. Today, Market Square has been part of a wave of revitalization of Downtown Brownsville and in 2020 it reopened to the public as a newly restored community hub. This book chapter presents a historical analysis of the transformative nature of Market Square as community infrastructureInfrastructure over time, a building that blurred the line between public and private through an embrace of street life. The chapter will explores the parallel efforts of the city to introduce new local businesses at the heart of the city and forecast potential futures for the region.