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Alphabetical Listing

Adobe Ruins Monitoring, Mesa Verde, Cortez, CO 1996
Ayyubid City Wall, Cairo, Egypt 1999
Bar B C Ranch, Grand Tetons, Jackson, WY 2011 - present
Bar B C
Established in 1912 by Struthers Burt and Horace Carncross, the Bar BC Dude Ranch is the oldest extant dude ranch in Wyoming and possibly in the United States. It is nestled on the flood plain between the Snake River and Teton Park Road. Created by its owners to include cabins, recreational buildings, a pool, corral, and fencing, the site was set up to offer paying customers the opportunity to socialize as well as enjoy the great outdoors.
Belmont Mansion, Philadelphia, PA 1995
Brooklyn Historical Society, Brooklyn, NY 1991
Burial Ground, Southampton,  NY 2004 and 2007
Capilla Del Santa Cristo, San Juan, Puerto Rico 2002
Casa Grande, Coolidge, AZ 1995 - 1999
Castello Sermonetta, Italy 1990
Catalhoyuk, Turkey 1997 - 1999
Center Church Burial Ground, New Haven, CT 1990
Chief Tomokie Monument,Tomoka State Park, Daytona Beach, FL 1998
Chiripa-Bolivia 2005
Civilian Conservation Corps Buildings 2001
Cliff Palace, Mesa Verde, Cortez, CO 1998 - 2000
Convent Column and Plaster, San Antonio, TX 1993 - 1994
Coronado State Monument, Albuquerque, NM 1998
Deschler Morris House, Germantown, PA 2006
Drayton Hall, Charleston, SC 1991 and 1999
Drayton Hall
Drayton Hall is well known as one of the earliest and certainly one of the finest examples of Georgian Palladian architecture in the United States. From the time of its construction until the period of the American Civil War, it served as the principle residence and symbolic seat of the descendants of John Drayton, a family of major influence and achievement in the history of the colony and state of South Carolina.
Durham Castle, Durham, England 2009
El Morro, Ramah, NM 1993 - 1997
Farview House, Mesa Verde, Cortez, CO 2009
Ferrara, Italy 1993
Florissant Fossil Bed National Monument 2017
The Architectural Conservation Laboratory is actively involved in a unique project examining the feasibility of stabilizing large petrified stumps on the Petrified Forest Loop at Florissant Fossil Beds National Monument. These petrified stumps constitute one of the major natural resources of the park. This project focuses on developing site-based methods for the conservation of petrified trees to benefit the park’s mission to conserve its fossil forest.
Fort Brockhurst, Gosport, England 1995
Fort Union National Monument, Watrous, NM 2016 - present
Established in 1964, Fort Union National Monument is the largest earthen ruin in North America, and commemorates the United States’ expansion of the American frontier during the age of Manifest Destiny. Long rectangular voids in the adobe walls once served as doors and windows. There are no roofs, there is no shelter, these ruins are exposed to the elements all around themThis research developed and tested a framework for the identification and classification of climate-related risks associated with specific masonry and earthen (adobe) built heritage including their context, exposure, materials, construction, previous treatments, maintenance, monitoring, and other critical attributes that affect durability and weathering. The goal was to describe how different manifestations of climate change (e.g., threats) will affect different types of traditional built heritage, especially masonry and adobe ruins. 
Frijoles Canyon, Bandelier NM, Los Alamos, NM 2001 and 2004
George Nakashima’s Art Building and Cloister, New Hope, PA 2015
The Arts Building and Cloister occupies a privileged position as the most iconic and architecturally significant of Japanese-American woodworker and architect George Nakashima’s built work. Dedicated on May 7, 1967, the building was intended as space of artistic interchange and contemplation. Of paramount importance is its hyperbolic paraboloid roof expressed in plywood.
Gordion, Yassihoyuk, Turkey 2009
As one of the principal archaeological sites in Central Anatolia, Gordion premieres Phrygian architecture that includes a nearly complete monumental 9th century BCE masonry gate, along with the remains of a once impressive citadel. Few sites in the world offer a glimpse of the Late Bronze and Iron Ages in Anatolia.
Grand Canyon National Park, AZ 2010
Guggenheim Museum, New York, NY 1992
HABS 1998
Hovenweep National Monument, Montezuma Creek, UT 2012
Indian Key, Islamorada, FL 2000
Jackson Lake Lodge, Jackson, WY 2014 - 2017
Jackson Lake Lodge
Completed in 1955, Jackson Lake Lodge was designed by architect Gilbert Stanley Underwood. The lodge is an example of the National Park Service’s interpretation of the International Style which became a hallmark of the Mission 66 Program from 1956 to 1966. The lodge combines elements of rustic structures of the earlier decades of the 20th century with a modern design aesthetic that responded to automobile travel.
John Moulton Homestead
Pink House
The John Moulton homestead stands out among the many vernacular log structures in Grand Teton National Park for its near total preservation as built in 1938. Among its character defining features is its distinctive: a pink-painted cement stucco exterior.
Longhouse, Mesa Verde, Cortez, CO 2005
Mancos Free Press, Mancos, CO 2015
Merchants Exchange, Philadelphia, PA 2004 and 2007

William Strickland’s Philadelphia Merchants’ Exchange Building in Independence National Historical Park is notable for its innovative architectural design including colossal order colonnades with fluted shafts of Pennsylvania marble surmounted by Italian Carrara marble capitals of the Composite order. Ornately carved and signed by their Italian craftsmen, the capitals represent some of the most exceptionally sculpted architectural elements in Philadelphia and the country.
Mission San Juan Capistrano, San Juan Capistrano, CA 1993 and 1995
Mission San Xavier del Bac, Tucson, AZ2018 -  Present
Mt. Edgcumbe, Cornwall, England 2007 - 2009
Mug House, Mesa Verde, Cortez, CO 1994 - 1996
National Historic Landmarks Database 1995
New York State Pavilion, Queens, NY 2007
Ohio State House, Columbus, OH 1990
Orto Botanico, Rome, Italy 2002
Pecos National Historical Park, Pecos, NM
Pipespring National Monument, Kaibab, AZ
Pipe Spring
Housing lush springs in the arid Arizona Strip, Pipe Spring has historically been a valuable resource for the Kaibab Paiute Indians and later Mormon pioneers due to its history and location within the evolving Southwest landscape. Since 1923 the site has also served an important role in the National Park Service’s early interpretation of the scenic attractions and historical development of the region.
Pit and Quarry, Northampton, PA 2016
Pit and Quarry
The Lehigh Valley’s extractive industries created a much altered landscape with vast and deep quarries, enormous kilns, and mill buildings in a complex landscape that allows for the exploration of architectural, ecological, and socio-cultural considerations.The intent of this project was to produce a well-documented and methodologically driven website that clearly identifies the critical components of this neglected large-scale industrial landscape through one of its principle industries. The Pennsylvania “Slate Belt,” an area of only 22 square miles, lies approximately 50 miles to the northwest of Philadelphia and just south of Blue (Kittanning) Mountain between the Delaware and Lehigh Rivers. The first quarries opened in the 1830s, but significant growth followed in the first decade of the twentieth century when Lehigh Valley accounted for approximately half the slate produced in the United States, eventually becoming the greatest slate producing region in the world.
Protestant Cemetery, Rome, Italy 1991
Quarters 5 and 6, Mesa Verde National Park, Cortez, CO
Rocky Mountain National Park, Estes Park, CO 2010
Rosario Chapel, San Juan, Puerto Rico 2006 - 2008
San Antonio Missions, San Antonio, TX 1997 and 2007
San Juan Forts Grafitti, San Juan, Puerto Rico 2003
Second Bank of the United States, Philadelphia, PA 1995 - 1999 and 2004
Second Bank
The easily accessible Pennsylvania marble quarried just north of Philadelphia was an important regional building stone for public and domestic structures in the nation’s largest colonial city. During the first half of the nineteenth century, William Strickland’s Second Bank of the United States and Merchant’s Exchange were among the first monumental stone structures to showcase the area’s famous marble.
Sprucetree House, Mesa Verde, Cortez, CO 2003 and 2008

Discovered in 1888, Spruce Tree House is one of the largest and best preserved alcove sites in Mesa Verde National Park. Containing over eighty rooms and seven kivas as well as open areas with very complete surface finishes with geometric embellishments, Spruce Tree House provides a remarkable window onto the region’s Ancestral Puebloan communities of the 13th century AD.
St Louis Cemetery no. 1, New Orleans, LA 2000
St Louis  Cemetery no. 2, New Orleans, LA
Strawberry Hill, Twickenham,  England 2005
Swan Memorial, Woodlawn Cemetery Bronx, NY
Tiffany Mosaic, Woodlawn Cemetery, Bronx, NY
Tiwanaku, Bolivia 2003
Trinity Cathedral, Pittsburgh, PA 1990, 2000 and 2007
Tsankawi, Bandelier, Los Alamos NM 1997
Tumacácori National Historical Park, Tumacácori, AZ 2014 - present
Victoria Mansion, Portland, ME 2004
Vizcaya Miami, FL 2003
Vizcaya, built for industrialist James Deering, has survived remarkably intact since its completion in 1922, but unlike the house the gardens have undergone significant changes since their completion the following year. The periodic impact of tropical storms and hurricanes has created ongoing conservation concerns that continue to impact the plantings and the architecture of the gardens.
Wagner Institute, Philadelphia, PA 2007
Western Clay Kiln 7, Helana, MT 2010
Western Clay
Brick and tile manufacturing was once ubiquitous throughout much of the United States. Today, however, only a fraction of these industrial complexes survive. Of those standing, few preserve the buildings and machinery, kiln technology, and overall industrial landscape as the Western Clay Manufacturing Company site on the outskirts of Helena, Montana.
Whitney Studio, New York, NY 2009

As one of the few surviving examples of the work of artist Robert Winthrop Chanler, the Whitney Studio stands today as a masterpiece of early 20th century decorative art. Located on historic MacDougal Alley in Greenwich Village, the site is positioned at what once was the center of the early modern art movement in America.