Harlan and Hollingsworth

Delaware Colony in the North American Middle Colonies consisted of land on the west bank of the Delaware River Bay. In the early 17th century the area was inhabited by Lenape and possibly the Assateague tribes of Native Americans. The first European settlers were Swedes, who established the colony New Sweden at Fort Christina at present day Wilmington, in 1638. The Dutch captured the colony in 1655 and annexed it to New Netherland to the north. The English took control from the Dutch in 1664, and in 1682, William Penn, the Quaker Proprietor of Pennsylvania to the north, leased "the three lower counties on the Delaware River" from James, the Duke of York (future King James II). The Lower Counties of Delaware were governed as part of Pennsylvania from 1682 until 1701, when the Lower Counties petitioned for and were granted an independent colonial legislature; the two colonies shared the same governor until 1776. The English colonists who settled Delaware were mainly Quakers. In the first half of the 18th century, New Castle became (with Philadelphia) the main port of entry to the new world for a quarter of a million Protestant immigrants from the north of Ireland (referred to as "Scotch-Irish" in America and "Ulster Scots" in Northern Ireland). Delaware had no established religion. With the start of the American Revolutionary War, Delaware's assembly voted to break all ties with both Great Britain and Pennsylvania, forming the state of Delaware.

The Harlan and Hollingsworth Office Building is a historic office building located in Wilmington, New Castle County, Delaware. It was completed in 1912, and stands on the corner of West St. and the Wilmington Rail Viaduct. It is a three-story, detached, rectangular brick-faced building with two small rear wings in the Colonial Revival style. It features two large, decorated copper-faced bay windows projecting from each face of the right corner of the second story.By 1910, existing office facilities at the Harlan Plant of Bethlehem Steel (formerly Harlan and Hollingsworth) had become inadequate, and work started on a new office building. It survived the closing of the Harlan Plant in 1944, and once housed laboratories for Gates Engineering Company. The building was purchased by 100 South West Street Associates in 1991 and restored.It was listed in the National Register of Historic Places in 1979.

The Brandywine Building is a 19-story, 260 foot high rise building in downtown Wilmington, Delaware. It contains primarily office and commercial space. The building was originally built in 1970 as an expansion for DuPont's Headquarters, but is now mostly used by Citi.

The River Tower at Christina Landing is a high rise located in Wilmington, Delaware. It is the tallest residential building in both the city of Wilmington and the state of Delaware, rising 25 stories with a 13th floor, and 295 ft (90m.). The Building was constructed in 2005, and opened in 2007. The tower was designed by Stantec Architecture, Inc.This skyscraper's main purpose is as a residential building. It contains a pool, Jacuzzi, and a sitting area on the roof. There is also space reserved for parties. The skyscraper also has eight stories of parking garage for residents who live there.

Water Street Station is a former station of the Baltimore and Ohio Railroad in Wilmington, Delaware, designed by Frank Furness. The station served only trains terminating in Wilmington; through trains used a separate station at Delaware Avenue to the northwest.

The Wilmington Rail Viaduct is a series of fills and bridges, about 4 miles (6.4 km) long, that carries the Northeast Corridor through the city of Wilmington, Delaware, above street level. Constructed between 1902 and 1908, the structure consists principally of fills supported by heavy stone retaining walls, punctuated with plate girder bridges over streets, and augmented by a few sections of brick arch viaduct. Its construction is typical of the Pennsylvania Railroad's architectural practices at the time, and the viaduct has been documented by the Historic American Engineering Record and listed on the National Register of Historic Places. Built by the Pennsylvania Railroad (PRR) as part of a series of grade crossing eliminations along the Northeast Corridor, the elevation of the rail line necessitated several other changes to rail infrastructure in Wilmington, including the construction of the Wilmington Shops at the east end of the viaduct, and the construction of the Wilmington Station and adjacent Pennsylvania Railroad Office Building along the elevated right-of-way.

The Quaker Hill Historic District is a national historic district located at Wilmington, New Castle County, Delaware. It encompasses 151 contributing buildings in a residential neighborhood west of the central business district of Wilmington. The district includes 19th-century residential structures of all classes, along with several 19th-and 20th-century commercial structures. The predominant structures are three-story rowhouse dwellings in a variety of popular styles including Second Empire, Italianate, and Gothic Revival. Notable non-residential buildings include the Quaker Meetinghouse and Cemetery, St. Peter's Cathedral and Rectory (1816), Union Methodist Church, and New Mount Bethel Baptist Church It was added to the National Register of Historic Places in 1979, with a boundary increase in 1985.

Friends Meetinghouse is a historic Quaker meeting house at 4th and West Streets in Wilmington, Delaware in the Quaker Hill neighborhood. The meeting is still active with a membership of about 400 and is part of the Philadelphia Yearly Meeting. It was built in 1815–1817 and added to the National Register of Historic Places in 1976.

Lower Market Street Historic District is a national historic district located at Wilmington, New Castle County, Delaware. It encompasses 132 contributing buildings the central business district of Wilmington. It includes attached commercial and commercial/residential structures dating from the mid-18th to the early-20th century. The buildings reflect a variety of popular architectural styles including Classical Revival, Greek Revival, Federal, and Art Deco. Notable buildings include the Farmers Bank (1912), Jake's Market (c. 1870), Wilmington and Brandywine Bank, Joshua Conner and Sons, J.T. Montgomery Jewelry Store, and Wilmington Publishing Company Building.It was added to the National Register of Historic Places in 1980, with a boundary increase in 1985.

The Joseph R. Biden, Jr., Railroad Station, also known as Wilmington station, is a passenger rail station in Wilmington, Delaware. One of Amtrak's busiest stops, it serves nine Amtrak train routes and is part of the Northeast Corridor. It also serves SEPTA Regional Rail commuter trains on the Wilmington/Newark Line as well as DART First State local buses and Greyhound Lines intercity buses. Built in 1907 as Pennsylvania Station, the station was renamed in 2011 for then-Vice President (now President) Joe Biden, an advocate for passenger rail who routinely took the train from Wilmington to Washington, D.C. during his time as a Senator from 1973 to 2009. In 1987, Biden formally announced his ultimately unsuccessful bid for the 1988 Democratic presidential nomination at this station. Located on Front Street between French and Walnut Streets in downtown Wilmington, the station has one inside level with stores, a cafe/newsstand, Amtrak and SEPTA ticket offices, a car rental office, and restrooms. Passengers board their trains on the second-story train platforms.

State of Pennsylvania was a steamboat that was built in Wilmington, Delaware in 1923, along with her identical sister ship State of Delaware. The steamboat operated on the Delaware River between her homeport of Wilmington and the cities of Chester and Philadelphia in Pennsylvania, as well as Riverview Park in Pennsville, New Jersey. Regular service on these routes was stopped in 1960. The boat foundered near her dock on the Christina River in 1970. In 1979, she was listed on the National Register of Historic Places. In 1988, the upper decks were destroyed by a deliberately set fire, and in 2005 the hull was removed and scrapped as a hazard to navigation, all without the ship being raised.

The Cathedral of Saint Peter is the mother church of the Roman Catholic Diocese of Wilmington. Located on West 6th Street in Wilmington, Delaware. the cathedral is in the Quaker Hill Historic District of the city.