What is a portico?

A portico is defined as a porch that leads to the entrance of a building, typically consisting of a roof supported by columns. This architectural feature serves not only an aesthetic purpose but also provides shelter and a welcoming entryway, enhancing the overall design of the building.

In terms of its function, a portico can offer a transition space between the outdoors and the indoors, allowing for a sheltered area for people to enter and exit. Its design often reflects the architectural style of the building, which may include specific details like the arrangement of columns or decorative elements.

While some of the other options may relate to roofing elements or construction techniques, a portico specifically emphasizes the concept of a covered entrance area, making the definition of a porch leading to a building entrance the most accurate.