Charles L. Thompson and associates is an architectural group that was established in Arkansas since the late 1800s. It is now known as Cromwell Architects Engineers, Inc.. This article is about Thompson and associates' work as part of one architectural group, and its predecessor and descendant firms, including under names Charles L. Thompson, Thompson & Harding, Sanders & Ginocchio, and Thompson, Sanders and Ginocchio.

The firm was the "most prolific architectural firm" practicing in Arkansas in the late 1800s and early 1900s, and produced more than 2,000 buildings. The architectural group used standard and custom designs that both led and evolved with changing architectural taste in Arkansas. The group built a wide range of types of works, including large public buildings, commercial buildings, mansions, and small houses. Many works by Thompson and the associated firms survive and are listed on the National Register of Historic Places.

Charles L. Thompson Charles Louis Thompson (16 November 1868 – December 30, 1959)Charles Witsell Jr., Charles Louis Thompson (1868–1959), Encyclopedia of Arkansas History and Culture was the original head of the firm. Thompson was born in 1868 in Danville, Illinois. Orphaned at age fourteen, he and siblings moved to Indiana, where Charles began work at a mill, and in off hours began to learn drafting.

Architects Theodore M. Sanders and Frank J. Ginocchio Jr., partners since 1920, joined Thompson in partnership in 1927. Both had studied at the University of Illinois and Sanders had studied further at the Ecole des Beaux Arts in Paris. They brought design ideas of Prairie Style, influenced by Frank Lloyd Wright, and Art Deco architecture to the firm.

Thompson retired from practice in 1938 at about the age of 70. He left the office with his partners, who continued the firm under the name of Sanders & Ginocchio. Sanders withdrew in 1941, and Ginocchio continued the partnership with Edwin B. Cromwell, Thompson's son-in-law. The firm has been known as Cromwell Architects Engineers since 2000.

Architect John Parks Almand worked for the firm during 1912 to 1914 before forming his own practice.

Thematic Resources study A total of 143 properties in thirty Arkansas counties were nominated for NRHP listing in the 1982 study, "Charles L. Thompson Design Collection Thematic Resources", written by multiple authors. F. Hampton Roy, a Little Rock ophthalmologist, began cataloging the architectural drawings, expecting to complete a book. His collection eventually inspired this study, as Thompson and associates had such influence on Arkansas architecture. The properties listed under this study were selected from review of a large collection of original drawings by Charles L. Thompson, Fred J. H. Rickon, Thomas Harding Jr., Theo Sanders, and Frank Ginocchio. The collection of drawings covered 2500 properties representing a wide range of types and styles geographically distributed over the entire state of Arkansas. The authors wrote: "The 143 structures selected for nomination exemplify the firm's remarkable versatility and productivity from 1896 through 1931," and "Charles L. Thompson was the constant motivating force behind the firm's immense productivity and influence upon the state's built environment. Today the firm he established continues this legacy."

Works Dates are date of completion where known; other dates are approximate.

Charles L. Thompson, 1889–1891, 1897–1916 and 1925–1927 1890 – Dr. Green's Hydropathic Clinic, 1623 Broadway St, Little Rock, ArkansasGovernor's Mansion Historic District NRHP Inventory-Nomination Form (1978) 1892 – Ragland House, 1617 Center St, Little Rock, Arkansas 1899 – Campbell-Chrisp House, 102 Elm St, Bald Knob, Arkansas 1899 – Clark County Courthouse, 4th and Crittenden Sts, Arkadelphia, Arkansas 1899 – Pfeifer Brothers Department Store, 522-524 S Main St, Little Rock, Arkansas 1900 – Brown House, 1604 Caldwell St, Conway, Arkansas 1900 – Fletcher House, 909 Cumberland St, Little Rock, Arkansas 1900 – French-England House, 1700 Broadway, Little Rock, Arkansas 1900 – Hotze House, 1619 Louisiana St, Little Rock, Arkansas 1900 – Johnson Houses, 514, 516 and 518 E 8th St, Little Rock, Arkansas 1900 – Kittrell House, 1103 Hickory St, Texarkana, Arkansas 1900 – Thurston House, 923 Cumberland St, Little Rock, Arkansas 1900 – Vanetten House, 1012 Cumberland, Little Rock, Arkansas 1900 – Woodruff County Courthouse, 500 N 3rd St, Augusta, Arkansas 1901 – Saline County Courthouse, Courthouse Sq, Benton, Arkansas 1901 – St. Edwards Church, 823 Sherman St, Little Rock, Arkansas 1903 – Clark County Library, 609 Caddo St, Arkadelphia, Arkansas 1903 – Dr. James Wyatt Walton House, 301 W Sevier, Benton, Arkansas 1904 – Dortch Plantation, AR 130 at Bearskin Lake, Scott, Arkansas 1904 – Fordyce House, 2115 S Broadway, Little Rock, Arkansas 1904 – Ramsey-McClellan house, 210 Cleveland Ave NW, Camden, ArkansasClifton and Greening Streets Historic District NRHP Registration Form (1998) 1905 – Ella Carnall Hall, University of Arkansas, Fayetteville, Arkansas 1905 – Davis House, 212 Fulton St, Clarksville, Arkansas 1905 – Joe P. Eagle and D. R. Boone Building, 105–107 W Front St, Lonoke, Arkansas 1905 – Mehaffey House, 2101 Louisiana, Little Rock, Arkansas 1905 – Turner House, 1701 Center St, Little Rock, Arkansas 1905 – Vinson House, 2123 Broadway, Little Rock, Arkansas 1905 – Washington County Courthouse, College Ave and E Center St, Fayetteville, Arkansas 1906 – Remmel Flats, 1700-1702 Spring St, Little Rock, Arkansas 1907 – Bank of Carthage, AR 229, Carthage, Arkansas 1907 – Boone County Courthouse, Courthouse Sq, Harrison, Arkansas 1907 – First Presbyterian Church, 213 Whittington, Hot Springs, Arkansas 1907 – Hemingway House and Barn, 3310 Old Missouri Rd, Fayetteville, Arkansas 1907 – Little Rock City Hall, 500 W Markham St, Little Rock, Arkansas 1907 – McKennon House, 115 Grandview, Clarksville, Arkansas 1907 – Nash House, 409 E 6th St, Little Rock, Arkansas 1907 – Nash House, 601 Rock St, Little Rock, Arkansas 1907 – Pugh House, US 165, Portland, Arkansas 1907 – Waters House, 515 Oak St, Fordyce, Arkansas 1908 – Croxson House, 1901 Gaines St, Little Rock, Arkansas 1908 – Fordyce Home Accident Insurance Company, 300 N Main St, Fordyce, Arkansas 1908 – Marshall House, 2009 Arch St, Little Rock, Arkansas 1909 – First Baptist Church, 1719 Robinson Ave, Conway, ArkansasRobinson Historic District NRHP Registration Form (2001) 1909 – Terminal Hotel, Markham and Victory Sts, Little Rock, Arkansas 1910 – Lo Beele House, 312 New York Ave, Brinkley, Arkansas 1910 – Dean House, US 165, Portland, Arkansas 1910 – Dunlap House, 101 Grandview, Clarksville, Arkansas 1910 – Fordyce House, 746 Park Ave, Hot Springs, Arkansas 1910 – Hospital and Benevolent Association, 11th and Cherry, Pine Bluff, Arkansas 1910 – E. S. Ready House, 929 Beech St, Helena, Arkansas 1910 – Stewart House, 1406 Summit St, Little Rock, Arkansas 1910 – Vaughan House, 2201 Broadway, Little Rock, Arkansas 1910 – Wheat House, 600 Center St, Lonoke, Arkansas 1910 – White House, 1015 Perry St, Helena, Arkansas 1911 – Hudson House, 304 W 5th St, Pine Bluff, Arkansas 1911 – Mitchell House, 1415 Spring St, Little Rock, Arkansas 1911 – Monroe County Courthouse, Courthouse Sq, Clarendon, Arkansas 1911 – Puddephatt House, 1820 S Olive St, Pine Bluff, Arkansas 1911 – Reid House, 1425 Kavanaugh St, Little Rock, Arkansas 1912 – Al-Amin Temple, 21st and Main Sts, Little Rock, Arkansas 1912 – Deener House, 310 E Center Ave, Searcy, Arkansas 1912 – Foster House, 303 N Hervey St, Hope, Arkansas 1912 – Johnson House, 315 Martin St, Pine Bluff, Arkansas 1912 – Keith House, 2200 Broadway, Little Rock, Arkansas 1912 – J. M. McClintock House, 43 Magnolia St, Marianna, Arkansas 1912 – W.S. McClintock House, 83 W Main St, Marianna, Arkansas 1912 – D. L. McRae House, 424 E Main St, Prescott, Arkansas 1912 – Russell House, 1617 S Olive St, Pine Bluff, Arkansas 1913 – Frauenthal House, 631 Western, Conway, Arkansas 1913 – Galloway Hall, Hendrix College, Conway, Arkansas 1913 – Ida Hicks House, 410 W Arch St, Searcy, Arkansas 1913 – Katzenstein House, 902 W 5th St, Pine Bluff, Arkansas 1913 – Little Rock Central Fire Station, 520 W Markham St, Little Rock, Arkansas 1913 – Mann House, 422 Forrest St, Forrest City, Arkansas 1913 – Merchants & Farmers Bank, Waterman and Main Sts, Dumas, Arkansas 1913 – President's House, Hendrix College, Conway, Arkansas 1913 – Walls House, 406 Jefferson St, Lonoke, Arkansas 1914 – Boone County Jail, Central Ave and Willow St, Harrison, Arkansas 1914 – Bridges Building, 500-502 S Main St, Pine Bluff, ArkansasPine Bluff Commercial Historic District NRHP Registration Form (2008) 1914 – England House, 2121 Arch St, Little Rock, Arkansas 1914 – Farrell Houses, 2109, 2111, 2115 and 2121 Louisiana St, Little Rock, Arkansas 1914 – Rogers House, 400 W 18th St, Little Rock, Arkansas 1914 – Wooten-Collette house, 616 Miller St, Helena, ArkansasBeech Street Historic District NRHP Inventory-Nomination Form (1987) 1915 – Baer House, 1010 Rock St, Little Rock, Arkansas 1915 – Dunaway House, 2022 Battery, Little Rock, Arkansas 1915 – Eagle House, 217 Ash St, Lonoke, Arkansas 1915 – Pulaski Heights City Hall (former), 2713 Kavanaugh Blvd, Little Rock, ArkansasHillcrest Historic District NRHP Registration Form (1990) 1915 – Retan House, 2510 Broadway, Little Rock, Arkansas 1915 – U. M. Rose School, Izard and W 13th Sts, Little Rock, Arkansas 1915 – Skillern House, 2522 Arch St, Little Rock, Arkansas 1916 – Clark House, 1324 S Main St, Malvern, Arkansas 1916 – Darragh House, 2412 Broadway, Little Rock, Arkansas 1916 – Gazzola and Vaccaro Building, 131-133 W Cypress, Brinkley, Arkansas 1916 – Nichol House, 205 Park Pl, Pine Bluff, Arkansas 1916 – St. Paul's Parish Church, 5th and Main, Batesville, Arkansas 1916 – Trimble House, 518 Center St, Lonoke, Arkansas 1917 – Beyerlein House, 412 W 14th St, Little Rock, Arkansas 1918 – Bethel House, Erwin and 2nd Sts, Des Arc, Arkansas 1920 – Fred and Lucy Alexander Schaer House, 13219 US 70, Galloway, Arkansas 1920 – Tom Watkins House, Oak and Race Sts, Searcy, Arkansas 1925 – Associate Reformed Presbyterian Church, 3323 W 12th St, Little Rock, Arkansas 1925 – First National Bank of Morrilton, Main and Moose Sts, Morrilton, Arkansas 1925 – Henry Crawford McKinney House, 510 E Faulkner, El Dorado, Arkansas 1926 – Bishop Hiram A. Boaz House, 22 Armistead Rd, Little Rock, Arkansas 1926 – Charles H. Murphy Sr. House, 900 N Madison Ave, El Dorado, Arkansas 1927 – Boone House, 4014 Lookout, Little Rock, Arkansas

Rickon & Thompson, 1891–1897 1894 – Hemingway House, 1720 Arch St, Little Rock, Arkansas

Thompson & Harding, 1916–1925 1915 – Gracie House, AR-88, New Gascony, Arkansas 1917 – Arkadelphia High School Domestic Science Building, 11th and Haddock Sts, Arkadelphia, Arkansas 1917 – Florence Crittenton Home, 3600 W 11th St, Little Rock, Arkansas 1917 – McRae House, 1113 E 3rd St, Hope, Arkansas 1917 – Mitchell House, 1138 Main St, Batesville, Arkansas 1917 – Mount Holly Mausoleum, 12th and Broadway, Little Rock, Arkansas 1917 – Remmel Apartments, 1704-1706 and 1708-1710 Spring and 409-411 W 17th Sts, Little Rock, Arkansas 1918 – Farmers State Bank, 1001 Front St, Conway, Arkansas 1918 – Howson House, 1700 S Olive St, Pine Bluff, Arkansas 1918 – Martin Hall, Hendrix College, Conway, Arkansas 1918 – Shull House, 418 Park, Lonoke, Arkansas 1919 – Bush House, 1516 Ringo St, Little Rock, Arkansas 1919 – Frauenthal House, 2008 Arch St, Little Rock, Arkansas 1919 – H. D. Hicks house, 1814 Robinson Ave, Conway, Arkansas 1919 – T. C. McRae House, 506 E Elm St, Prescott, Arkansas 1919 – Smith House, Memphis Ave, Wheatley, Arkansas 1919 – Strauss House, 528 E Page St, Malvern, Arkansas