 In the past it was referred to as "Hueco del Alto" or "Alto de la carretas" as it was the place where wagons would stop before crossing the "Tercero del Sur" stream (today called "Pasaje San Lorenzo") on their way downtown.The name had been "Alto de San Pedro" and later changed to "Plaza del Comercio" in 1822.In 1905, the name was changed once again to its current form.