 Complete the following phrase:  In the center of this plaza lies the famous Fuente de los Leones Lions Fountain. The large, round-shaped fountain is bounded by a low, marmol and granite wall. The fountains wall boundary is shaped in the form of a regular octagon and built so that one of the vertices of the octagon points towards the historic Ponce City Hall. The fountain also features four lion statues and water that flows under colored lighting effects. The four lion statues are located one statue on each alternating vertex of the fountains octagonal boundary wall. The fountain was purchased in 1939 at the 