Insulae

This fine apartment building shows the second floor balconies where the
Ostians loved to linger on sultry summer evenings. The arched doorways on the
ground floor led to shops and a wonderfully preserved snack bar.
Perhaps another age will imagine that most Romans lived in vast marble palaces,
moving through spacious halls amid stately pillars and spraying fountains.
Nothing like this is the case for the vast majority. A census report declares
"there are some 44,000 tenement blocks (insulae) in the city and only about
1750 separate mansions (domus). These numbers are from the fourth century. Such
figures can imply that an overwhelming proportion of the "toga-wearing
race, the Lords of the world" (to quote Virgil) are apartment dwellers.
Considering the extreme congestion of population, no other solution than this is
possible if Rome is to remain Rome. There is a great profit in building these
huge, ungainly islands of insulae. Nearly every Senator has his men of business
caring for his housing investments and rentals, and the "realtor" is a
very familiar personage.
It is complained also that many insulae are put up in a cheap and absolutely
dangerous manner. The very name imples that they should be built with a free
space all around them. The old law of Twelve Tables (450 BC) required a passage
way (ambitus) of at least two and one half feet on either side, but this law was
recklessly disregarded until the great fire of Nero enabled the government to
enforce a better building code. However, even then, the insulae are often hemmed
in on all sides by miserable back alleys hardly accessible.

"The immense size of Rome," wrote Vitruvius, about 1 AD,
"makes it needful to have a vast number of habitations, and as the area is
not sufficient to contain them all on the ground floor, the nature of the case
compels us to raise them in the air."

The typical insulae
On the street, there are usually several shops and several separate entrances
where the doorways give access to the extra select apartments above. But most
tenants have to go through the central portal. Upon entering they will find
themselves in a courtyard upon which open many windows of the tiers of rooms in
the upper stories.
From the courtyard, several staircases rise to the tenements above. In the
apartments on the first floor are the more comfortable suites, each with a
series of rooms. The quality falls rapidly as the tenants scale higher. Juvenal
writes, "If the (fire) alarm goes at ground level, the last to fry will
be the attic tenant, way up among the nesting pigeons, with nothing but tiles
between himself and the weather."

Daily Life in Ancient Rome, Jerome Carcopino, Yale University Press, 1968
A History of Private Life, Philippe Aries and Georges Duby, General
Editors, Harvard University Press, 1992
Roman People, Second Edition, Robert B. Kebric, Mayfield Publishing
Company, 1993
The Oxford History of the Classical World, John Boardman, Jasper Griffin,
Oswyn Murray. Oxford University Press, 1986