How did the buildings and sanitation help keep the roman empire?

Answer 1

It is not clear what exactly mean by keep the Roman Empire.

With regard to sanitation, most buildings in the city of Rome were not very helpful for public health. The insulae were apartment blocks six-seven floors high where most Romans lived. The top floors were the dwellings of the poor. They had overcrowded rooms and no cooking facilities or running water. Therefore, the poor went there only to sleep. They ate outdoors went to the public toilets and the the public baths. Yet, the Romans were concerned about public health.

The Romans believed in good health. The key health facility was the public baths, where you could wash, swim, do exercises and have massages and, in the bigger baths go to a library listen to poetry readings and participate in debates. This range of facilities reflected the Roman belief that good health consisted in eating, cleanliness, massage, exercise and intellectual pursuits. This was exemplified in the expression 'mens sana in corpore sano' a healthy mind in a healthy body. The Romans built public baths (thermae) wherever they went.

Like the baths, other Roman public health measures were aimed at improving cleanliness which was considered key to good health, such as building sewers, building public toilets, draining swaps and marshes, and providing clean water by building aqueducts These were also standard practice which the Romans applied everywhere they went.

Buildings which helped with administration were the basilicae (singular basilica). These were public buildings which hosted public administration offices, the courts and other public amenities.

The forts were structures where the legions were garrisoned and helped to maintain military control, and public order or to guard the frontiers