1884 in architecture
The year 1884 in architecture involved some significant architectural events and new buildings.
- Antoni Gaudí begins work on the Sagrada Família church in Barcelona.
- Washington Monument in Washington, D.C., designed by Robert Mills, is completed.
- Hungarian Royal Opera House in Budapest, designed by Miklós Ybl, is opened.
- Garabit viaduct in France, engineered by Gustave Eiffel and Maurice Koechlin, is completed.
- The Dakota apartment building on the Upper West Side of Manhattan in New York City, designed by Henry Janeway Hardenbergh, is completed.
- Cornerstone of Statue of Liberty laid in New York Harbor.
- February 6 - Vlastislav Hofman, Czech artist and Cubist-influenced architect (died 1964)
- July 6 - Willem Marinus Dudok, Dutch Modernist architect (died 1974)
- August 27 - Alfredo Baldomir, Uruguayan soldier, architect and politician (died 1948)
- September 26 - Antonio Barluzzi, Italian Franciscan monk and architect, known as the "Architect of the Holy Land" (died 1960)
- November 24 - Michel de Klerk, Dutch Amsterdam School architect (died 1923)
- February 10 - Richard Shackleton Pope, English architect working in Bristol (born 1793)
- March 26 - Edward Milner, English landscape architect (born 1819)
- July 27 - Frigyes Feszl, Hungarian architect, a significant figure in the romantic movement (born 1821)
- August 3 - Paul Abadie, French architect and building restorer (born 1812)
- date unknown - Eugenius Birch, English naval architect, engineer and noted pier builder (born 1818)