One Calvert Plaza

{{Use mdy dates|date=February 2025}}

{{Use American English|date=January 2025}}

{{Infobox building

| building_name = One Calvert Plaza

| image = One Calvert Plaza.jpg

| caption = One Calvert Plaza viewed from The Bank of America Building

| former_name = Continental Trust Building
The Continental Building
Mercantile Trust Building

| location = 201 East Baltimore Street (southeast corner with South Calvert Street)
Baltimore, Maryland

| coordinates = {{coord|39.2897|-76.6122|region:US-MD_type:landmark|display=title,inline}}

| start_date =

| completion_date =

| building_type = Commercial offices

| architectural_style = Beaux-Arts

| antenna_spire = {{convert|76|m|abbr=on}}

| roof = {{convert|67|m|abbr=on}}

| floor_count = 16

| elevator_count =

| cost =

| floor_area =

| engineer =

| contractor =

| developer =

| owner =

| management =

| architect = D.H. Burnham & Company (Chicago)
Thompson-Starret Company

{{Infobox nrhp

| name = Continental Trust Company Building

| nrhp_type =

| image =

| embed = yes

| location = 1 South Calvert Street
Baltimore, Maryland

| built = {{Start date|1900}}

| architect = Burnham, D. H. & Co.; Thompson-Starret Company

| architecture = Skyscraper

| added = February 3, 1983

| area = less than one acre

| refnum = 83002930{{NRISref|2010a}}

}}

| references = {{Cite web |url=https://www.emporis.com/buildings/118966 |archive-url=https://web.archive.org/web/20160306204402/https://www.emporis.com/buildings/118966 |url-status=usurped |archive-date=March 6, 2016 |title=Emporis building ID 118966 |work=Emporis}}{{SkyscraperPage|18916}}{{Structurae|20021282}}

}}

One Calvert Plaza, formerly the Continental Trust Company Building, is a historic 16-story, {{convert|76|m|abbr=on}} skyscraper in Baltimore, Maryland. The Beaux-Arts, early modern office building was constructed with steel structural members clad with terra cotta fireproofing and tile-arch floors. Its namesake was chartered in 1898 and instrumental in merging several Baltimore light and gas companies into one citywide system (known as the "Consolidated Gas, Light, Electric Power Company of Baltimore City" until 1955 when it was shortened and renamed the "Baltimore Gas and Electric Company"). It was constructed in 1900–1901 to designs prepared by D.H. Burnham and Company of Chicago and is a survivor of the Great Baltimore Fire of February 1904, that destroyed more than {{convert|100|acre}} in the present downtown financial district.{{cite web|url=https://mht.maryland.gov/secure/medusa/PDF/NR_PDFs/NR-730.pdf |title=National Register of Historic Places Registration: Continental Trust Company Building|date=November 1981|accessdate=2016-03-01 |author=William Meyers|publisher=Maryland Historical Trust}} When it was built in 1901, it was then the tallest building in Baltimore, and it kept that title until being surpassed by the iconic Bromo-Seltzer Tower of the Emerson Drug Company on the northeast corner of West Lombard and South Eutaw Streets on the downtown west side. Led by Capt. Isaac Edward Emerson, (1859–1931), the inventor of the stomach remedy and antacid, "Bromo-Seltzer" in 1911.

Continental Trust Company Building was listed on the National Register of Historic Places in 1983. It is within the Baltimore National Heritage Area.{{cite web | url=http://www.baltimorecity.gov/Portals/0/agencies/heritage/public%20downloads/neighborhoods_heritageareas.pdf | title=Baltimore National Heritage Area Map | publisher=City of Baltimore | accessdate=March 11, 2012 | url-status=dead | archiveurl=https://web.archive.org/web/20130522024255/http://www.baltimorecity.gov/Portals/0/agencies/heritage/public%20downloads/neighborhoods_heritageareas.pdf | archivedate=May 22, 2013 }}