Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad More
Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power More
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili More
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili More
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili More
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili More
Location of the signing of the Treaty of Ghent. 2004 Charles E. Peterson Prize, First Place Significance: Excellent and innovative example of Federal style domestic architecture. Served as Executive Mansion fo More
Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati More
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop More
Significance: This building provided administration facilities for the base. Engineering drawings indicate that most Nike administration buildings contained a day room, offices for the battery commander, batte More
Significance: This building provided administration facilities for the base. Engineering drawings indicate that most Nike administration buildings contained a day room, offices for the battery commander, batte More
Significance: This building provided administration facilities for the base. Engineering drawings indicate that most Nike administration buildings contained a day room, offices for the battery commander, batte More
Significance: This building provided administration facilities for the base. Engineering drawings indicate that most Nike administration buildings contained a day room, offices for the battery commander, batte More
Significance: This building provided administration facilities for the base. Engineering drawings indicate that most Nike administration buildings contained a day room, offices for the battery commander, batte More
Engineering drawing showing the cog wheel connecting the fly wheel shaft of the engine with the main hammer shaft and the cam ring and cam of the main hammer shaft of a steam engine. [No.] 22. Forms part of: Be More
Engineering drawing showing the cog wheel connecting the fly wheel shaft of the engine with the main hammer shaft and the cam ring and cam of the main hammer shaft of a steam engine. [No.] 22. Forms part of: Be More
Inscriptions on recto: "Transverse Elevation" "September 29th 1808" "Boiler" "Flue" "Chimney flue" "Cylinder selle" "Cistern" "Ash pit." Delineator: James Smallwood. (Source: The Engineering Drawi More
Inscriptions on recto: "Transverse Elevation" "September 29th 1808" "Boiler" "Flue" "Chimney flue" "Cylinder selle" "Cistern" "Ash pit." Delineator: James Smallwood. (Source: The Engineering Drawi More
1999 Charles E. Peterson Prize, Entry Significance: Bella Vista Terrace (1910), located in Sierra Madre, California, is nested against the southern foothills of the San Gabriel mountains. Architect Irving John More
Significance: The Hartford City Public Library is one of the many libraries in the State of Indiana that was established with a grant from Andrew Carnegie. Carnegie gave Hartford City a gift of $16,000 on Janu More
Inscriptions on recto: "Philada 22nd March 1810" "Engine Navy Yard Washington" "23." Delineator: James Smallwood. (Source: The Engineering Drawings of Benjamin Henry Latrobe, New Haven, Conn. : Published fo More
Inscriptions on recto: "Philada 22nd March 1810" "Engine Navy Yard Washington" "23." Delineator: James Smallwood. (Source: The Engineering Drawings of Benjamin Henry Latrobe, New Haven, Conn. : Published fo More
Public domain reproduction of illuminated book page, 14th century, free to use, no copyright restrictions image - Picryl description.
Public domain reproduction of illuminated manuscript page, free to use, no copyright restrictions image - Picryl description
Public domain reproduction of illuminated book page, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a historical building, landmark architecture, world heritage, free to use, no copyright restrictions.
Public domain image of watercolor painting from British-related collections, free to use, no copyright restrictions - Picryl description
Print shows construction of a railroad and a canal in a wilderness area. Illus. in: The contractors book of working drawings of tools and machines used in constructing canals, rail roads and other works, with b More
Print shows construction of a railroad and a canal in a wilderness area. Illus. in: The contractors book of working drawings of tools and machines used in constructing canals, rail roads and other works, with b More
Significance: The imposing Static Test Laboratory was built during Wright Field's World War II expansion. It replaced Static Test Laboratory No. 1, which was too small for testing new, larger aircraft, and had More
Elevation rendering, column of U.S. Capitol. Scaled. Reference copy in album: Engineering projects directed by Montgomery Meigs, Washington, D.C. ca. 1852-1860, p. 52, no. 99, Lot 12332.
Elevation rendering, column of U.S. Capitol. Scaled. Reference copy in album: Engineering projects directed by Montgomery Meigs, Washington, D.C. ca. 1852-1860, p. 52, no. 99, Lot 12332.
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: Building T-2320 is significant as a standing example of a large Theater of Operations (T.O.) building type designed as a general purpose shop, adapted to meet the unique functional needs at Fort M More
Significance: For over a century (1853-1965) the Columbus Iron works supplied the city and surrounding area with a wide assortment of cast iron goods, agricultural implements, industrial and building supplies, More
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l More
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l More
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l More
Significance: Buildings 1 and 2 at Canal Station were constructed in 1861 and 1887 as carbarns in support of the operation of the New Orleans City Railroad Company. The design, construction, and modification o More
Significance: The complex of buildings was built between 1868-1927 by the Sullivan Machinery Company, manufacturers of mining and quarrying equipment. The firm had been founded in 1868 by J.P. Upham, Albert Bal More
Significance: The complex of buildings was built between 1868-1927 by the Sullivan Machinery Company, manufacturers of mining and quarrying equipment. The firm had been founded in 1868 by J.P. Upham, Albert Bal More
Significance: The complex of buildings was built between 1868-1927 by the Sullivan Machinery Company, manufacturers of mining and quarrying equipment. The firm had been founded in 1868 by J.P. Upham, Albert Bal More