Why did Roman architects frequently use the archvaultand dome in construction?

Roman architects frequently used the arch, vault, and dome in construction because these structural elements allowed for the creation of larger and more stable spaces than traditional post-and-lintel systems. The arch distributes weight more evenly, enabling the construction of monumental structures like aqueducts and amphitheaters. Vaults and domes further expanded interior spaces and provided aesthetically pleasing, open designs, as seen in famous structures like the Pantheon. This innovative use of geometry and engineering facilitated the grandeur and durability characteristic of Roman architecture.