From the description mentioned below, identify the structures being referred to:

'The multi-storeyed single-room apartments with long open corridors built around a courtyard. Such buildings which housed many families sharing common spaces helped in the growth of neighbourhood identity and solidarity.'

Chawl

In the more "Indian" localities of Bombay traditional styles of decoration and building predominated. The lack of space in the city and crowding led to a type of building unique to Bombay, the chawl, the multi-storeyed single-room apartments with long open corridors built around a courtyard. Such buildings which housed many families sharing common spaces helped in the growth of neighbourhood identity and solidarity.