Because back in the day when people thought the world was flat that the water would come rising into homes and buildings and eventually drown everyone, so the Italians built most of there buildings on hilltops so they wouldn't drown.
Hilltops are easily defensible (fighting down towards an intruder is easier than attacking uphill).
Many of the most successful great early American civilizations built large cities along water. Typically these cities were built along the Atlantic Ocean.
Protection from invaders.
helpe me
So they could have a water source.
it was built using a grid system, just as modern cities are.
Yes.
Mayan and Aztec civilizations of Central and South America
built a state highway system to connect cities
They bred, they warred, they farmed, they fished, they worshiped the gods, they built cities, they built fleets, they conducted theatre, they painted and sculpted, they enslaved.
Italy's cities were built mostly on hills, so higher ground was an advantage when they were facing outside threats. And though it was difficult to cross Italy because of its rockiness, they had streams running out of the hills, so it was and easy source of fresh water.
A high rocky hill on or near which early people built cities is called a citadel or acropolis. These fortified elevated sites provided strategic advantages, such as defensive positions and improved visibility, making them ideal for early settlements and city-building. Examples include the Acropolis of Athens in Greece and the Citadel of Machu Picchu in Peru.
Cities are typically built in locations that offer access to resources such as water, fertile land, and transportation routes. Many cities also evolve around natural features like rivers, coasts, or mountains, as these can provide economic and strategic advantages. Historical factors, such as trade routes or early settlements, also play a role in determining where cities are built.