Roman Catholic Diocese of Springfield in Massachusetts

The Springfield Science Museum is located in Springfield, Massachusetts, in the United States. Founded in 1859, the museum has operated in its current building since 1899. The building has undergone two expansions, in 1934 and 1970. It is also home to the country's oldest operating projection planetarium, Seymour Planetarium.

The Quadrangle–Mattoon Street Historic District is a historic district in Springfield, Massachusetts, bounded by Chestnut Street to the West; State Street to the South; and includes properties on Mattoon, Salem, Edwards and Elliot Streets. Located in the Metro Center, the Quadrangle–Mattoon Street Historic District is one of the few neighborhoods in the Knowledge Corridor lined with historic, restored red-brick Victorian row houses on both sides, covered by tree canopies. The Quadrangle–Mattoon Street Historic District consists of housing stock of various architectural styles, from detached Victorian houses, to attached red-brick row-houses, to H.H. Richardson churches. The area contains Mid 19th Century Revivals and Late 19th And 20th Century Revivals.Since 2006, Metro Center – and in particular, the Quadrangle–Mattoon Street Historic District – has seen a notable resurgence in residential living, with growing populations of people seeking an urban, cultural environment at reasonable prices, e.g. 20-somethings, LGBTs, bohemians, urban professionals, and empty-nesters. The Mattoon Street neighborhood features many of Springfield's most prestigious residential addresses, on Mattoon Street, Salem Street, Elliot Street, etc. It also features one of the famous architect H.H. Richardson's first works in the Richardsonian Romanesque style, the Hispanic Baptist Church. Early each Fall, the neighborhood hosts a large arts festival, "The Mattoon Street Arts Festival." The historic district's namesake Quadrangle features a grouping of five museums around the Dr. Seuss Memorial Sculpture Garden. Recent developments include 2008's $57 million Moshe Safdie-designed, Federal Courthouse on State Street; and the TRO Jung|Brannen designed $101 million adaptive reuse of Springfield's original Technical High School for Massachusetts' Data Center.

St. Michael's Cathedral is the mother church of the Diocese of Springfield in Massachusetts, United States, established in 1847. In 1974 the church and rectory were included as contributing properties in the Quadrangle–Mattoon Street Historic District, listed on the National Register of Historic Places.

North Congregational Church was built in Springfield, Massachusetts in 1872-73, and was one of the early works by noted American architect Henry Hobson Richardson. It is one of his first works in the Romanesque style.

The Quadrangle is the common name for a cluster of museums and cultural institutions in Metro Center, Springfield, Massachusetts, on Chestnut Street between State and Edwards Streets. The Dr. Seuss National Memorial Sculpture Garden, in the center of the Quadrangle, is surrounded by a park, a library, five museums, and a cathedral. A second cathedral is just on the Quadrangle's periphery.

Metro Center is the original colonial settlement of Springfield, Massachusetts, located beside a bend in the Connecticut River. As of 2019, Metro Center features a majority of Western Massachusetts' most important cultural, business, and civic venues. Metro Center includes Springfield's Central Business District, its Club Quarter, its government center, its convention headquarters, and in recent years, it has become an increasingly popular residential district, especially among young professionals, empty-nesters, and creative types, with a population of approximately 7,000 (2010.) Metro Center is physically separated from the Connecticut River by Interstate 91 – a 1958 urban renewal project that separated the city from its riverfront.

The Michele and Donald D'Amour Museum of Fine Arts, also called the D'Amour Museum of Fine Arts, is an art museum on the Quadrangle in Springfield, Massachusetts, which is primarily focused on paintings and works on paper.

The Dr. Seuss National Memorial Sculpture Garden is a sculpture garden at the Quadrangle in Springfield, Massachusetts, which honors Theodor Seuss Geisel, better known as Dr. Seuss, who was born in Springfield in 1904. The monument was designed by Lark Grey Dimond-Cates, the author's stepdaughter, and created by sculptor and artist Ron Henson.

Christ Church Cathedral is an Episcopal cathedral located in Springfield, Massachusetts, United States. It is the seat of the Diocese of Western Massachusetts. In 1974 the cathedral was included as a contributing property in the Quadrangle–Mattoon Street Historic District, listed on the National Register of Historic Places.

The Amazing World of Dr. Seuss Museum is a museum in Springfield, Massachusetts, United States located in the William Pynchon Memorial Building, which until 2009 housed the Connecticut Valley Historical Museum. The museum opened in June 2017. It is located on the Quadrangle along with the Dr. Seuss National Memorial Sculpture Garden and other museums.

The Puritan is a bronze statue by sculptor Augustus St. Gaudens in Springfield, Massachusetts, United States, which became so popular it was reproduced for over 20 other cities, museums, universities, and private collectors around the world, and later became an official symbol of the city, emblazoned on its municipal flag. Originally designed to be part of Stearns Square, since 1899 the statue has stood at the corner of Chestnut and State Street next to The Quadrangle.

The Church of the Unity was a church building designed by H. H. Richardson and built in Springfield, Massachusetts in 1866. It housed the Third Congregational Society, a Unitarian congregation founded in 1819 (although they were referred to as the Church of the Unity during their residence in the building). It was demolished in 1961.