sentences:  The area most densely populated by Africans was located in the neighborhood of Monserrat, also known as "Barrio del Tambor" (Drumtown), just a few blocks from the Congressional Palace.Slaves would group themselves in societies they called nations, some of which were Conga, Cabunda, African Argentine, Mozambique, etc.The commonalities among the meeting places of the nations included artificially flattened and sanded opened spaces for dancing; others were closed in with interior free space.