Question: What type of porch leading to the entrance of a building was used in an ancient structure in Rome?

Context paragraphs:
Henry Weis House: The Henry Weis House is a historic building located in Waterloo, Iowa, United States.  Weis was a factory owner that produced egg case fillers, which were used to protect eggs during shipping.  He engaged the local architectural firm of Murphy & Ralston to design this house, which was completed in 1902.  Architecturally, the two-story frame structure is "transitional" in its design, featuring elements of the Queen Anne and the Colonial Revival styles.  The Queen Anne is found in its irregular plan, wraparound porch, full-height bays, small second floor porch, and the small screened porch.  The Colonial Revival is found in the Ionic fluted porch columns, and the consoles with a row of dentils located along the cornice.  The house also features foliated designs on the gable ends.  It remained in the Weis family into the 1930s when it was converted into apartments.  It has subsequently been converted into a bed and breakfast.  The house was listed on the National Register of Historic Places in 1989.

Benjamin Franklin Coppess House: The Benjamin Franklin Coppess House, built in 1882, is a historic Queen Anne and Stick-Eastlake style house located at 209 Washington Street in Greenville, Ohio, United States.  Featuring an unusually detailed Stick-Eastlake brick facade, the Coppess House is a T-shaped building that is supported by a stone foundation; the roof is asphalt, and minor elements of stone are also visible.  A large enclosed porch and a veranda wrap around the "lower" portion of the "T", which faces the street, while above and behind the porch, placed at the base of the "T", sits a large bay window.  The porch is among the most significant components of the building, due to elements such as exquisitely detailed arches formed of tiny spindles, which sprout from columns meant to resemble massive table legs; one must walk under one such arch to use the porch's main entrance, located on one of its corners, and three more such arches are placed on the front and on the side to either side of the entrance.  Small gables are placed over the porch's main entrance and a subsidiary one, decorated with small sculptures, both carven and molded.

Portico (disambiguation): A portico is a porch leading to the entrance of a building with a roof structure over a walkway.  Buildings named after their porticos include:

Dr. Van Buren Knott House: The Dr. Van Buren Knott House is a historic building located in Sioux City, Iowa, United States.  Knott was a prominent local physician.  He had Chicago architect Howard Van Doren Shaw design this Colonial Revival-style house, which is considered an excellent example of the style.  The 2½-story brick structure features a symmetrical facade, an entrance porch with Doric columns, a Palladian window above the front entrance, a single-story semi-circular room in the back, and a hip roof roof with dormers. On the south side of the house is a full width porch, with a sleeping porch on the second floor.  A pergola in the back leads to a detached two-car garage, which was built a couple of years after the house.  The house and garage were listed together on the National Register of Historic Places in 1999.

Polonnaruwa Vatadage: The Polonnaruwa Vatadage is an ancient structure dating back to the Kingdom of Polonnaruwa of Sri Lanka.  It is believed to have been built during the reign of Parakramabahu I to hold the Relic of the tooth of the Buddha or during the reign of Nissanka Malla of Polonnaruwa to hold the alms bowl used by the Buddha.  Both these venerated relics would have given the structure a great significance and importance at the time.  Located within the ancient city of Polonnaruwa, it is the best preserved example of a vatadage in the country, and has been described as the "ultimate development" of this type of architecture.  Abandoned for several centuries, excavation work at the Polonnaruwa Vatadage began in 1903.

Wells Fargo and Company Express Building: The Wells Fargo and Company Express Building was built "circa" 1877 in Silver Reef, Utah.  It is one of three surviving structures in Silver Reef, which is now a ghost town.  The building housed the offices of the Wells Fargo Company.  The structure was built by local masons George Brooks and Ira McMullin of local red sandstone, with finished ashlar masonry by Brooks in the front and coursed rubble stone by McMullin on the other three sides.  A parapet surrounds the single-slope roof on the front and sides.  The main level is divided into two equal-sized rooms, each with two front entrances and a rear entrance, with a vault on one side.  The basement does not connect to the upper levels.  It was used as a stable.  The Wells Fargo building was used as a mine supply store in the late 19th century, then for a time as the residence of the Colbath family.  Its last use was as offices for the Western Gold and Uranium Company, who added a rear porch structure.  The building is owned by Washington County.

Almon Asbury Lieuallen House: The Almon Asbury Lieuallen House was added to the National Register of Historic Places in 1978.  Located at 101 S. Almon St. in Moscow, Idaho in Latah County the house was built in 1884.  The structure has a mansard roof and two-story bays on either side of the entrance.  The structure originally had a smaller covered porch, and the bays were more visible than at present.  A small railed balcony atop the porch was accessible by a door on the second floor.  That door has been replaced by a window, and the porch expanded to cover the entire east side of the facade.  Additional dormer windows have been added on the third floor to provide additional lighting and ventilation for the top floor.  The structure has always been used as a residence, first as a family home, then as apartments.  It is currently used as multi-family apartments.

Dudley-Bessey House: The Dudley-Bessey House, also known as the Major Phillip B. H. Dudley Home, is an historic two-story, single-family house located at 110 SW Atlanta Avenue in Stuart in Martin County, Florida.  Built in 1909 for Phillip B. H. Dudley, it features a first floor central hallway which runs from the street-side entrance straight though to the main entrance which faces the Halpatiokee River, now known as the South Fork of the St. Lucie River.  All interior rooms open from this hallway.  It later became home of Hubert W. Bessey, 1855–1918, one of the founders of Stuart, Sometime before 1989 the street side was altered by the addition of a long porch with a flat roof and a sloped roof over the entryway.  Today most of the front porch has been enclosed and incorporated into the building, leaving only a sheltered entryway with a grander sloped roof over the entry way and hip roofs over the each side of the former porch.  The interior has been restored and the building became the offices of Rubin and Rubin, a law firm founded by Ellis Rubin The building now houses a yacht brokerage office.

Portico: A portico (from Italian) is a porch leading to the entrance of a building, or extended as a colonnade, with a roof structure over a walkway, supported by columns or enclosed by walls.  This idea was widely used in Ancient Greece and has influenced many cultures, including most Western cultures.

Porticus Octaviae: The Porticus Octaviae (Portico of Octavia; Italian: "Portico di Ottavia" ) is an ancient structure in Rome.

Supporting paragraphs: Porticus Octaviae Portico
Answer: Portico