Ledo Pizza started in 1955 near the University of Maryland. There are some unique qualities of LEDO Pizza that come from its long history. People often ask why LEDO Pizza is rectangular. The round pizza pans commonly seen today were very new in the fifties. Rectangular baking pans were readily available, hence the square pizza. Since that time, round pans have become the rage as pizza operators are able to cut costs by giving the appearance of more, while actually offering less.