Roman Catholic Diocese of Wilmington

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.

Woodward Houses are two historic homes located at Wilmington, New Castle County, Delaware. The house at 701 West Street was built about 1745, and is a 3+1⁄2-story, three bay, quarried granite dwelling with a gable roof. It has an L-shaped, side-hall plan. The house at 703 West Street was built about 1760, and is a 3+1⁄2-story, three-bay, stuccoed stone dwelling with a gable roof. It is three feet shorter in both length and width than 701. Its interior was altered in the mid-19th century and then in the 1930s to accommodate apartment dwellings. They are excellent examples of the Georgian style. The houses were probably built by Joseph Woodward, a Quaker ropemaker from West Chester, Pennsylvania. There is a legend that the house at 703 contains a hearthstone which was a section of the platform where Thomas Jefferson stood to read the Declaration of Independence to the people of Philadelphia.The houses were added to the National Register of Historic Places in 1979.

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.

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.

Zachariah Ferris House is a historic home located at Wilmington, New Castle County, Delaware. It was built between 1718 and 1749, and was an example of an early farmhouse continually occupied by professional and working families. It is a two-story, brick dwelling measuring 29 feet wide and 18 feet deep with a gable roof. It features a panel of brickwork between the two windows of the second floor, where two rows of numerals and letters are built in with dark glazed headers. The house was owned by Congressman Louis McLane and U.S. Senator Outerbridge Horsey.It was added to the National Register of Historic Places in 1970. In 1976, it was moved to Willistown Square to save it from demolition. It is now owned by the Delaware Historical Society and is part of the Old Town Hall Commercial Historic District.

Obidiah Dingee House, also known as the Obadiah Dingee House, is a historic home located at Wilmington, New Castle County, Delaware. It was built about 1771, and is an example of an 18th-century urban residence continually occupied by working families. It is a two-story, brick dwelling consisting of a 19 feet, 6 inches wide by 24 feet deep main block with a rear wing. It is adjacent to the Jacob Dingee House. In 1976, it was moved from its original location at 107 E. 7th Street to Willingtown Square of the Delaware Historical Society. It was added to the National Register of Historic Places in 1970.

Jacob Dingee House is a historic home located at Wilmington, New Castle County, Delaware. It was built about 1771, and is an example of an 18th-century urban residence continually occupied by working families. It is a two-story, brick dwelling consisting of a 17 feet, 5 inches wide by 24 feet deep main block connected to a 13 feet, 8 inch wide, and 31 feet deep rear wing by a 10 feet wide, 6 feet long connector wing. It is adjacent to the Obidiah Dingee House. In 1976, it was moved from its original location at 105 E. 7th Street to Willingtown Square of the Delaware Historical Society. It was added to the National Register of Historic Places in 1970.

Foord & Massey Furniture Company Building is a historic warehouse and showroom located at Wilmington, New Castle County, Delaware. It was built between 1917 and 1919, and is a five-story, five bay by four bay, brick commercial building. It has Collegiate Gothic Revival elements, one of the few commercial buildings in the immediate area designed in this style.It was added to the National Register of Historic Places in 2006.

Crosby and Hill Building is a historic commercial building located at Wilmington, New Castle County, Delaware. It was built about 1859, with the present facade added in 1920. It is a four-story, three-bay rectangular plan building of bearing wall brick construction. It has a flat roof with parapet wall. The building is an example of a late-19th century commercial building that was "modernized" in the first quarter of the 20th century. The building has housed a number of businesses including a pharmacy, the Household of Faith Church, the Crosby and Hill dry goods wholesaler and retailer, the Diamond Silk Shirt and Waist Company, the Wilmington Board of Trade Builders Exchange, and John's Bargain Basement Department Store Company.It was added to the National Register of Historic Places in 1985.

Reynold's Candy Company Building is a historic commercial building located at Wilmington, New Castle County, Delaware. It was built in 1929 as a restaurant and candy factory. It is a three-story, three bay commercial building with a rectangular plan built of wall bearing brick construction. It features a curved cast metal canopy over the front doors, an ornate white terra cotta facade, terra cotta panels with stylized vine pattern relief, and is in the Beaux Arts style.It was added to the National Register of Historic Places in 1985.

The Delmarva Power & Light Building, also known as the DCAD Building, is a historic office building in downtown Wilmington, Delaware. The former headquarters of Delmarva Power & Light (DP&L) is listed on the National Register of Historic Places.

Old Town Hall is a historic town hall located at Wilmington, New Castle County, Delaware. It was built in 1798, and is a large two-story brick building in a late-Georgian / early-Federal style. The roof is gently sloping and is topped by a large octagonal cupola and once had a wooden balustrade. The building housed the Wilmington city government until 1916 and served as a focal point of many public events in Delaware's history. The property is owned and managed by the Delaware Historical Society It was added to the National Register of Historic Places in 1974.