Plastico di Roma Imperiale. In primo piano particolare del Foro Romano e Fori Imperiali

This vast model reconstructing the city of Rome in the age of Constantine, created by the architect Italo Gismondi, is positioned in a centre of a spacious Rome, at a low level to allow an easy view from above. 
The reconstruction, at a scale of 1:250, integrates the information from the marble Forma Urbis (the large plan of Rome created in the early III century AD) with data from the archaeological remains and ancient sources.