Simple two to four roomed apartments are also found in Ostia for the lower classes inhabiting an "insula". As seen in the Casa Di Diana, the ground floor contains a narrow corridor with several poorly lit cells that lead to what is believed to be a shared living area. This type of insula can also be found at Capitoline Hill in Rome which may suggest that this particular design could have been a common solution to high housing demand at the time. The latrine and cistern for drinking water also seem to be shared. This shared accommodation type meant for the lower classes was likely rented both by short term inhabitants and also acted as an inn for short-tenure or itinerant workers. However, this is merely conjecture as there is no direct evidence to support whether they were shared, nor how many inhabited the space at a given time.