Mellon National Bank Building

525 William Penn Place (also known as the Citizens Bank Tower) is a skyscraper located in downtown Pittsburgh, Pennsylvania. It was completed in 1951 for the Mellon National Bank and the U.S. Steel Corporation. At 520 feet (160 m) tall, it was the second-tallest building in Pittsburgh until 1970, and the third-tallest until 1984. The building has 41 floors and approximately 950,000 square feet (88,000 m2) of office space. Presently it is the third-largest office building by square feet in downtown Pittsburgh. In 2016, BNY Mellon sold the building for $67.65 million.

The Henry W. Oliver Building is a 25-story, 106 m (348 ft) skyscraper at 535 Smithfield Street, across from Mellon Square in Pittsburgh, Pennsylvania. The building was designed by Daniel Burnham and built 1908-10, consisting of a stone and terra cotta facade over a steel frame. It cost $3.5 million ($105.6 million today)

Mellon Square is an urban park in Downtown Pittsburgh, Pennsylvania. It is the first Modernist park built above a parking garage. With its distinctive black, white and green geometric pavement, it is a prominent urban oasis and gathering spot in Downtown Pittsburgh. The square, bounded by Smithfield Street, William Penn Place, and Oliver and Sixth Avenues, is surrounded by prominent downtown buildings including the Oliver Building, 525 William Penn Place, Omni William Penn Hotel, and the Regional Enterprise Tower. It has long been a popular lunchtime destination for downtown workers. In addition, retail shops are housed underneath it, along the Smithfield Street side of the square.

The Carnegie Building, also known as the Carnegie Steel Building, was a high-rise building in Pittsburgh, Pennsylvania.

Trinity Cathedral is an Episcopal Church in downtown Pittsburgh, Pennsylvania and is the cathedral for the Episcopal Diocese of Pittsburgh.The present Gothic church was completed in 1872 on the site of a hilltop cemetery on land deeded by heirs of Pennsylvania founder William Penn to the congregation's founders. The site, centered on a terrace above the historic "point" (where the Allegheny River and the Monongahela River join to form the Ohio River) was sacred to Native Americans as a burial ground. The Trinity Churchyard has the oldest marked graves west of the Atlantic Seaboard, of both Native American leaders, French, English, and American colonists.

The Frank & Seder Building is a 30-metre (98 ft), 7-story, former department store building completed in 1918 on Smithfield Avenue in downtown Pittsburgh, Pennsylvania, United States. The building is a contributing structure in the Pittsburgh Central Downtown Historic District.As of 2019, the historic building is being renovated as a mixed-use facility, Smith & Fifth, with 40 apartments on the upper two levels, 160,000 square feet (15,000 m2) of office space, and 25,000 square feet (2,300 m2) of retail space spread over the first 2 floors, and underground parking.

The Union Trust Building is a high-rise building located in the Downtown district of Pittsburgh, Pennsylvania, at 501 Grant Street. It was erected in 1915–16 by the industrialist Henry Clay Frick. The Flemish-Gothic structure's original purpose was to serve as a shopping arcade.

The Warner Centre is a former theater and concert hall located at 332 Fifth Avenue in Downtown Pittsburgh. It opened as the Grand Theatre on March 7, 1918, with Douglas Fairbanks in Headin' South and Winifred Westover in Her Husband’s Wife. The theater was renamed Warner Theatre on January 2, 1930. In 1983 the theater was closed, the auditorium was demolished, and a two story shopping center named Warner Center was built on the site.It was turned into an indoor shopping mall. A food court there closed in 2003.

The Frick Building is one of the major distinctive and recognizable features of Downtown Pittsburgh, Pennsylvania, United States. The tower was built by and is named for Henry Clay Frick, an industrialist coke producer who created a portfolio of commercial buildings in Pittsburgh. The building is listed on the National Register of Historic Places. The tower was built directly adjacent to a building owned by his business partner and rival Andrew Carnegie, on the site of Saint Peter Episcopal Church. Frick, who feuded with Carnegie after they split as business associates, had the building designed to be taller than Carnegie's in order to encompass it in constant shadow.The Frick Building was opened on March 15, 1902 and originally had twenty floors. It was the tallest building in the city at that time. A leveling of the surrounding landscape that was completed in 1912 caused the basement to become the entrance, so some sources credit the building with twenty-one stories. It rises 330 feet (101 m) above Downtown Pittsburgh. Its address is 437 Grant Street, and is also accessible from Forbes and Fifth Avenues. The building's architect was Daniel H. Burnham of D.H. Burnham & Company, Chicago. Of the eleven executed designs for Pittsburgh by D.H. Burnham & Company, the Frick Building is one of only seven survivors.The top floor, which was reserved for The Union Club of Pittsburgh, includes a balcony around the perimeter of the building, a high, handcrafted ceiling, and heavy, elaborate brass door fixtures. Originally, H.C. Frick used it as his personal office and as a meeting place and social club for wealthy industrialists. On the 19th floor was Frick's personal shower. At the time, no other shower had been built that high above ground level, because water could not easily be pumped that high with the technology of the time. The shower, non-functioning, still exists on the 19th floor today. Fittingly for a building created for a man who vowed to be a millionaire by age thirty, the lobby features an elegant stained-glass window by John LaFarge, depicting "Fortune and Her Wheel" (1902). The two bronze sentinel lions (1904) in the lobby were created by sculptor Alexander Proctor. A bust of Frick by sculptor Malvina Hoffman (1923) is displayed in the rear lobby, which extends from Forbes to Fifth Avenue.For a time, the building was home to the headquarters for Frick's family whiskey business, Old Overholt. The headquarters oversaw a network of sales offices around the United States.

The Pittsburgh Central Downtown Historic District is a historic district in the Central Business District of Pittsburgh, Pennsylvania, United States. Bounded by Wood Street, Forbes Avenue, Grant Street, and Liberty Avenue, it was listed on the National Register of Historic Places on December 17, 1985. Its boundaries were expanded on May 2, 2013.The original district includes 26 buildings, 20 of which are considered contributing including a few small former residences built in the mid-19th century. The Frick Building and U.S. Post Office and Courthouse are contributing properties and are also listed separately on the National Register of Historic Places. Other notable contributing properties are the Gulf Tower, the William Penn Hotel, the Oliver Building, Mellon Square, the August Wilson Center, the Federal Reserve Bank Branch, Gulf Tower, the Frank & Seder Building, the Koppers Building and Trinity Cathedral.

Carnegie Learning, Inc. is a provider of K-12 education solutions and services for math, literacy and ELA, world languages, and applied sciences. Carnegie Learning, Inc. is located in the Union Trust Building in Pittsburgh, PA.

The Heinz 57 Center is an office building in Pittsburgh, Pennsylvania at the corner of Sixth and Smithfield Avenues. The building has approximately 790,000 square feet (73,000 m2), standing 13 stories (190 feet (58 m)) tall.It was built in 1914 for the Kaufmann & Baer Co. department store. From 1925 to 1986 the building housed a Gimbels department store. Sitting largely vacant for 15 years, the building was remodeled into office space, serving as H.J. Heinz Co. North American Headquarters from 2002 to 2013. The building was designated as historical landmark by the Pittsburgh History & Landmarks Foundation in 1982.