Angkor Wat is a temple complex in Cambodia built in the 12th century, while Ur, Babylon, and Mohenjo-Daro are all ancient cities dating back to at least 3000 BCE.

The availability of a surplus of food production through agriculture allowed for the growth of permanent settlements and the development of urban centers.

Mesopotamia, located in modern-day Iraq, was renowned for its intricate network of canals used for irrigation, transportation, and trade.

City walls were primarily constructed for defensive purposes, protecting the inhabitants from external threats and invasions.

Early urban centers were characterized by settled populations, while nomadic lifestyles are associated with mobile communities.

Walking was the primary mode of transportation in early cities due to the lack of developed infrastructure and limited technological advancements.

Mesopotamia is credited with developing one of the earliest forms of writing, cuneiform, used for administrative and record-keeping purposes.

In early urban centers, human and animal labor were the primary sources of energy for various tasks, including agriculture, construction, and transportation.

Babylon, located in modern-day Iraq, is renowned for its ziggurats, monumental structures with religious and administrative significance.

Marketplaces served as central locations for trade and commerce, facilitating the exchange of goods and services among urban residents.

Rome is renowned for its impressive system of underground aqueducts, which transported water from distant sources to supply the city's population.

Scribes were responsible for maintaining written records, including administrative documents, religious texts, and historical accounts.

Ancient Rome is renowned for its extensive network of roads, bridges, and aqueducts, which facilitated transportation, trade, and water supply.

Temples were central to religious practices, serving as places of worship, ritual ceremonies, and offerings to deities.

The Indus Valley Civilization, located in modern-day Pakistan and India, is renowned for its sophisticated system of canals and irrigation networks, which supported agricultural production.