Russell Sage Foundation Building and Annex ARCHITECT: Grosvenor Atterbury; John A. Thompkins II DATE: 1912-23 The Russell Sage Foundation Building was constructed in 1912-13 for one of the leading reform social service organizations of the Progressive era. The Russell Sage Foundation was established in 1907 with an unprecedented ten million dollar bequest of Margaret Olivia Slocum Sage that was to be applied “to the improvement of social and living conditions in the United States of America.” Grosvenor Atterbury’s elegant design was inspired by the sixteenth-century Florentine palazzo but adapted to a twentieth-century office building. The structure’s principal facades are almost entirely clad in rock-faced Kingwood sandstone of a light brown/pink color.