At lunchtime, the Norman P. Leventhal Park at Post Office Square hosts a crowd of businesspeople eager for a few minutes away from the office. Among the park’s permanent residents are two fountains designed by Rhode Island artist Howard Ben Tré. Together, they form a unified installation, composed of a 12-foot-tall circular fountain in the park’s north plaza and a an urn-like structure in the south plaza. With their minimalist, abstract designs and glass surfaces, the fountains fit in well with the contemporary buildings surrounding the square while, also evoking traditional forms: a garden gazebo and a piece of classical pottery. Ben Tré has received numerous commissions for public art, including a fountain for the Mary Baker Eddy Library, located in Back Bay.