Old Pasadena in Los Angeles County, California — The American West (Pacific Coastal)

Original Site of Throop University

Forerunner of California Institute of Technology

Photographed by Col. James F. Jamison, USMC (Ret)

1. Original Site of Throop University Marker

Inscription.
Original Site of Throop University. Established on November 2, 1891. Forerunner of California Institute of Technology.

Erected 1991 by California Institute of Technology.

Topics. This historical marker is listed in this topic list: Education. A significant historical date for this entry is November 2, 1891.

Location. 34° 8.668′ N, 118° 9.015′ W. Marker is in Pasadena, California, in Los Angeles County. It is in Old Pasadena. It is at the intersection of East Green Street and Fair Oaks Avenue, on the right when traveling east on East Green Street. Touch for map. Marker is at or near this postal address: 50 E Green St, Pasadena CA 91105, United States of America. Touch for directions.

Regionally, this marker is in Greater Los Angeles

and in the Transverse Ranges.

It is also on the American Pacific Coast.

Globally, it is in North America,

on the Ring of Fire,

in the Pacific Rim,

in the Western Hemisphere,

in the Western World,

and in the Anglosphere.

Historically, it finds itself in what was once New Spain

and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within walking distance of this marker: 107 S. Fair Oaks Ave (about 300 feet away, measured in a direct line); Yuen Kee Laundry (about 300 feet away); Mercantile Place (about 300 feet away); Castle Green (about 400 feet away); Braley Building (about 400 feet away); a different marker also named Mercantile Place (about 400 feet away); Edwin Alley (about 400 feet away); 1909 Seagrave (about 400 feet away). Touch for a list and map of all markers in Pasadena.

Another marker is no longer nearby. Mills Place (was about 300 feet away but has been replaced with another marker now near it).

Regarding Original Site of Throop University.

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In 1903 this building was incorporated into the adjacent Hotel Green. Today, this is an apartment building, and the adjacent building is a condominium complex called Castle Green. In 1982 the entire block was added to the National Register of Historic Places and City of Pasadena’s list of Historic Places.

Also see . . . California Institute of Technology (Caltech). Caltech started as a vocational school founded in Pasadena in 1891 by local businessman and politician Amos G. Throop. (Submitted on April 30, 2019, by Col. James F. Jamison, USMC (Ret) of Coronado, California.)

Throop University Marker image. Click for full size.

Photographed by Craig Baker, May 21, 2019

2. Throop University Marker

Photographed by Col. James F. Jamison, USMC (Ret)

3. Throop University Marker

Original Site of Throop University image. Click for full size.

Photographed by Col. James F. Jamison, USMC (Ret), May 10, 2019

4. Original Site of Throop University

Castle Green image. Click for full size.

Photographed by Craig Baker, May 21, 2019

5. Castle Green

Adjacent building, facing Raymond Ave.

Credits. This page was last revised on June 10, 2025. It was originally submitted on April 23, 2019, by Col. James F. Jamison, USMC (Ret) of Coronado, California. This page has been viewed 819 times since then and 31 times this year. Last updated on May 21, 2019, by Craig Baker of Sylmar, California. Photos: 1. submitted on April 29, 2019, by Col. James F. Jamison, USMC (Ret) of Coronado, California. 2. submitted on May 21, 2019, by Craig Baker of Sylmar, California. 3. submitted on April 29, 2019, by Col. James F. Jamison, USMC (Ret) of Coronado, California. 4. submitted on May 10, 2019, by Col. James F. Jamison, USMC (Ret) of Coronado, California. 5. submitted on May 21, 2019, by Craig Baker of Sylmar, California. • Andrew Ruppenstein was the editor who published this page.