Omeyer & Thori was an architectural partnership of Diedrik A. Omeyer (1850-1907) and Martin P. Thori (1864-1905). The two were immigrants from Norway.
A number of the firm's and its individual partners' works are listed on the National Register of Historic Places.
Works include (with attribution):
William H. and Ida Garland House, 846 W. Fairmount Ave., St. Paul "a typically florid production of Norwegian Americans Omeyer and Thori"
Arcadia Free Public Library, 406 E. Main St. Arcadia, WI (Omeyer, Diedrik A.), NRHP-listed
Bank of Long Prairie, 262 Central Ave. Long Prairie, MN (Omeyer & Thori), NRHP-listed
Old Main (Augsburg College), 731 21st Ave., S. Minneapolis, MN (Omeyer,Didrik A.; Thori,Martin P.), NRHP-listed
Norman County Courthouse, 16 E.3rd Ave. Ada, MN (Omeyer & Thori), NRHP-listed
Old Main, Augustana Academy, Lawler and Second Sts. Canton, SD (Omeyer & Thori), NRHP-listed
Park Region Luther College, 715 W. Vernon Ave. Fergus Falls, MN (Omeyer & Thori), NRHP-listed
Steensland Library-St. Olaf College, Off St. Olaf Ave. Northfield, MN (Omeyer & Thori), NRHP-listed
United Church Seminary, 2481 Como Ave. St. Paul, MN (Omeyer,Didrik A.; Thori, Martin P.), NRHP-listed
Ada Village Hall, 404 W. Main St. Ada, MN Thori, Martin P., et al.
William E. Coleman House, 500 Missouri Ave. Deer Lodge, MT Ameryre & Thorie
Cottonwood County Courthouse, 900 3rd Ave. Windom, MN O'Meyer & Thori
Metropolitan Opera House (Iowa Falls, Iowa), 515 Washington St. Iowa Falls, IA O'Meyer & Thori
Nerstrand City Hall, Main St. Nerstrand, MN Thori,Alban, & Fisher
Steensland Library-St. Olaf College, Off St. Olaf Ave. Northfield, MN Omeyer & Thori
One or more works in Northwood Central Avenue Historic District, roughly, Central Ave. W near 5th St. to 9th St. on the East Northwood, IA (Omeyer and Thori), NRHP-listed
