National Historic Landmark

Hale Solar Laboratory

Pasadena, Los Angeles County, California
Listed
January 23, 1986
Type
Building
Period
Industrial
Ref No.
86000103

About this property

The Hale Solar Laboratory is a historic astronomical observatory in Pasadena, Los Angeles County, California, United States. Built in 1923, it was the laboratory of astronomer George Ellery Hale (1868-1938), a pioneering figure in the development of the discipline of astrophysics in the United States. The building, a distinctive blend of Mission Revival and Spanish Colonial Revival styles, was designated a National Historic Landmark in 1989. The Hale Solar Laboratory is located in a residential area on private property south of the campus of the California Institute of Technology, on the east side of Holladay Road between Lombardy and Orlando Roads. It is set well back from the street, down a narrow tree-lined lane. It is a roughly T-shaped concrete structure, with a tile roof. The stem of the T consists of the telescope tower and Hale's library/office and living area, while the top portion of the T historically housed electrical and ventilation equipment. The main entrance is at the base of the tower, set in an arch above which is an incised bas-relief tribute to Akhenaten, the Egyptian pharaoh who worshipped the sun god Aten. The observatory was designed by Reginald Davis Johnson (1882 - 1952), Gordon Kaufmann (1888–1949), and Roland Coate (1890-1958) and was completed in 1923. The site's landscape master plan and gardens were designed by Beatrix Farrand. After retiring as director at the Mount Wilson Observatory, George Ellery Hale built the Hale Solar Laboratory as his office and workshop, pursuing his interest in the sun. The observatory was where Hale refined the spectrohelioscope, making it possible to perform detailed observations of the surface of the Sun. Hale's other wide-ranging contributions to the sciences include the founding of the International Astronomical Union, the Astrophysical Journal, and instrumental contributions to the founding of the California Institute of Technology. The Hale Solar Laboratory was declared a National Historic Landmark in 1989. National Register of Historic Places listings in Pasadena, California National Park Service summary: Hale Solar Laboratory Palomar Skies: "A Visit to the Hale Solar Laboratory" - (2009 article)

Location

740 Holladay Rd.
Pasadena, Los Angeles County, California
34.13333, -118.12120

Categories

SCIENCEARCHITECTUREINVENTION
National Register nomination ›
Sources

Property data from the National Register of Historic Places, National Park Service (public domain).

Description adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License.

Unlimited access

Everything a full report reveals about Hale Solar Laboratory

This page lists Hale Solar Laboratory. A full Aubrey report for an address near it pulls together this listing alongside battlefield records, land patents, and every other historical record within a chosen radius:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your Hale Solar Laboratory report
Or see a real report first

Nearby Historic Sites

Mentor Court
Listed
0.6 mi
Emery, Katherine Estate
Industrial
0.6 mi
El Molino Viejo
Early Republic
0.7 mi
Haskett Court
Industrial
0.7 mi
Hubble, Edwin, House
Industrial
0.7 mi

Nearby Battles

Battle of San Gabriel (California 1847)
1847Mexican-American War
2.7 mi
Battle of La Mesa (California)
1847Mexican-American War
7.8 mi
Battle of San Gabriel
1847Mexican-American War
8.1 mi

Questions about this property

When was Hale Solar Laboratory listed on the National Register?

Hale Solar Laboratory was listed on the National Register of Historic Places on January 23, 1986.

What type of historic resource is Hale Solar Laboratory?

Hale Solar Laboratory is classified as a building in the National Register of Historic Places.

Is Hale Solar Laboratory a National Historic Landmark?

Yes. Hale Solar Laboratory has been designated a National Historic Landmark (NHL), the highest level of federal recognition for historic properties in the United States.

What is the period of significance for Hale Solar Laboratory?

The period of significance for Hale Solar Laboratory is recorded as the industrial era.

Can I research the history near Hale Solar Laboratory?

Yes. Aubrey Research reports search National Register listings, battlefield records, land patents, and other primary historical sources within any radius of a US address. A report for an address near Hale Solar Laboratory will include this listing and all other historical records in the area.

More in Los Angeles County

Historic places, battles, and census history across Los Angeles County.

Explore Los AngelesCounty ›

More historic places in California

Browse all historic places in California.

View Californiahistoric sites ›

Conflict records

Explore 19,000+ military engagements across American history.

Browse US conflicts ›

California history

Colonial settlement, territorial period, and statehood narrative.

Californiahistory ›

Research the history near this site

An Aubrey US report for an address near Hale Solar Laboratory will include this listing alongside battlefield records and other historical sources within your chosen radius.

Research your locationView a free sample report