Ecolab buildings, St. Paul, July 2017. In the foreground, the new Ecolab headquarters in downtown St. Paul. Behind can be seen the old tower on Wabasha, still bearing the Ecolab name.

Ecolab building, 2014. Photograph by Wikimedia Commons user McGhiever.

Economics Laboratory, 293 Como Avenue, St. Paul, October 8, 1962.

Economics Laboratory, 800 Eustis Street, St. Paul, ca. 1956.

Economics Laboratory, 144–146 South Livingston Avenue, St. Paul, ca. 1955.

The Endicott Building, ca. 1900. The first location of Economics Laboratory (later Ecolab) was in the basement of the Endicott Building on Fourth Street in downtown St. Paul.

Mechanic Arts High School, St. Paul, ca. 1928. Photograph by Charles P. Gibson.

Van Buren School (275 Maple Street, St. Paul), ca. 1905.

The skyline of the Cedar-Riverside neighborhood of Minneapolis viewed from the north. At center are the Riverside Plaza complex of apartment buildings and Mixed Blood Theatre. Photograph by Ibrahim Hirsi, May 3, 2017.

A winter view of the rustic-style latrine built in 1939 by the WPA. Architect: H. Petersen.