Did the Romans have flat roofs?

Yes, the Romans did have flat roofs, especially in urban areas where buildings were often constructed with flat or slightly sloped roofs made of materials like concrete or tiles. These roofs were typically used in conjunction with interior courtyards and could serve as additional living space. However, sloped roofs were also common in rural areas and for larger structures to facilitate rainwater drainage. Overall, the choice of roof design depended on the building's function and location.