How much do you know about architecture?

The Gothic style features pointed arches, vaulted roofs, and flying buttresses. Verticality is prominent. Famous Gothic cathedrals include Notre Dame, Cologne, and Reims.

The Gateway Arch features a catenary curve, which is the shape that a chain makes when hanging by its own weight. Of course, for the Gateway Arch, this curve is inverted.

Gargoyles and grotesques look similar - usually featuring frightening faces - but only gargoyles have spouts that direct water away from the side of a building. Gargoyles that have features of several different animals are called chimeras.

Frank Lloyd Wright popularized the Prairie style, which has dramatic horizontals and limited decoration. He also designed the Guggenheim Museum in New York.

A Corinthian column has a fluted shaft. The capital flares outward and it is decorated with small scrolls, acanthus leaves, and flowers. The Pantheon in Rome features Corinthian columns.

Jenney incorporated steel in his taller designs. He designed the Home Insurance Company Building in Chicago. Sullivan contributed new functional design for tall buildings. He designed the Wainwright Building in St. Louis.

A keystone is the center stone at the top of an arch. Both sides of the arch lean toward this pressure point.

Sears kit homes were built between 1908 and 1940. To identify a house as a Sears kit home, look for shipping labels on the back of millwork and moldings. Plumbing and electrical systems were sold separately.

Trompe l'oeil is decorative painting that fools the eye. Such painting may depict windows, columns, clouds, angels, or other decorative items that distract from the painted surface.

Ludwig Mies van der Rohe designed the Barcelona chair and stool to furnish his German Pavilion at the International Exibition in Barcelona, in 1929.

Visitors can see through the bridge to the canyon floor below. Plans include adding swings and a bungee jump, and the bridge may serve as a runway for fashion shows.

The rectangular frame around an archway is called a pishtaq. A gateway with a pishtaq is often found at the entrance to a mosque, caravanserai, madrasah, or mausoleum.

Art Deco features a number of popular motifs, including sunbursts, zigzags, chevrons, and sweeping curves.

A parapet is a long wall along the edge of a roof, bridge, or balcony. Per the Occupational Safety and Health Administration (OSHA), a roof parapet should be at least 39 inches high.

The Colosseum in Rome features Tuscan columns on the first level, Ionic columns on the second level, and Corinthian columns on the third level. Every level had eighty arches.

Colonial homes feature symmetrical façades and windows with many small panes. These homes have steep roofs, and the bedrooms are on the second floor.

The Great Pyramid of Giza held the record for being the tallest man-made structure for 3,871 years, until 1311, when the Lincoln Cathedral in England was built. The pyramid is currently about 455 feet tall, due to erosion, but it probably stood 480 feet when it was built.

A coffered ceiling has sunken panels, which may be square, rectangular, or octagonal. Such a design can provide a sense of order to crowded public spaces. The word "coffer" originally meant "basket" or "hollowed container."

A bungalow is rectangular, with one-and-a half stories. In India, the word "bungalow" means a small, thatched home.

The idea of a shotgun home is, hypothetically, if a shotgun is fired through the front door, the shot will exit through the back door.

Experts believe Machu Picchu was probably a royal estate or religions site. It was abandoned in the 16th century, following an invasion by the Spanish. The stones of Machu Picchu were fitted together without mortar.

Pueblo architecture features stucco or adobe walls, roof beams that project through the walls, and tile or brick floors. The style also features flat roofs and earth-toned walls.

Arch, truss, suspension, and cantilever are all types of bridges. Other types include beam, tied arch, and cable-slayed.

Ranch style homes feature a single story, attached garage, picture windows, and a patio. Ranches are associated with suburbia and casual living.

Gustav Stickley popularized the Craftsman style. Such houses are built low, with little ornamentation, to blend in with the landscape.

The Aon Center, originally called the Standard Oil Building, was resurfaced with granite after the marble started to fail. The renovation cost more than $80 million. On a side note, the loose marble slab hit the roof of the Prudential Center.

The Great Wall of China has mortar made with sticky rice. Amylopectin makes rice sticky and, conveniently, makes mortar strong. During construction of the Great Wall, as many as 400,000 people died, and many were buried within the wall. Mourners brought roosters to help guide souls away from the wall.

"Baroque" pearls are imperfect - they are asymmetrical and may not be smooth. Some are shaped like coins, some like eggs or crosses or hearts.

Feng Shui means "wind and water." "Chi" means "energy." Chi flows in through the door and out through windows, and ideally the chi should flow gently throughout a space, without being blocked.

Yellow means respect to the Chinese, and only Imperial palaces may be topped with yellow roofs. The Forbidden City, which is no longer forbidden, features a symmetrical plan.

Gaudi's work was not fully appreciated until years after his death in 1926. The Cathedral of the Sagrada Familia in Barcelona is Gaudi's most famous work, even though it is unfinished.

Riser, nosing, and newel are all components of a staircase. A riser is a vertical board that determines the height of each step; a nosing is the edge of the tread that hangs over the face of the riser; and a newel is the post at the base of a banister.

For I.M. Pei, the "impossible dream" is bringing together the modern and the traditional. Pei is known for Brutalism, which features bold, utilitarian forms.

Without vanity height, or unusable space at the top of skyscrapers meant to improve their appearance and stats, many buildings would drop down the list of the world's tallest. For example, about 29% of Dubai's Burj Khalifa is vanity height.

The Empire State Building is a 102-story skyscraper. The World Trade Center, which had two 110-story towers, was destroyed by terrorists on September 11, 2001.