Sonoma County Points of Interest
The marker reads:
Oddfellow's Hall 1910
The third IOOF lodge on this site since 1854.
The International Order of Oddfellows is a charitable welfare lodge which was especially influential in the historic West.
IOOF lodges are among the most important buildings in many American towns.
The Sonoma lodge merged with the Petaluma lodge in 1991.
Restoration in 1991
Ned Forrest, architect.

This building was added to the National Register of Historic Places in 1992 when the boundary of the Sonoma Plaza Historic District was expanded. The NRHP citation reads: "The IOOF Building, built in 1911, is a Classic Revival style two story buff brick building with round arched 4-over-l wood windows on the second level, corbelled cornice and original transom windows at first floor level. The letters IOOF are spelled out in darker brick raised above the surrounding lighter brick. There have been no significant alterations."
The NRHP nomination form states that the building was constructed in 1911 while the marker on the building shows the date as 1910.

The Independent Order of Odd Fellows (I.O.O.F.) is an altruistic fraternal organization derived from the similar English Oddfellows service organizations which came into being during the 1700s....Although in Britain the Odd Fellows tended to meet in pubs, in the U.S. the lodges often built their own facilities. Many of these are now on the U.S. National Register of Historic Places....
From Wikipedia entry for Independent Order of Odd Fellows
Historic IOOF Buildings in California
Arbuckle, Arroyo Grande, Big Oak Flat, Bloomfield, Colusa, Copperopolis (1874-1903), Copperopolis (1903-1939), Coulterville, Etna, Eureka, Farmington, Ferndale, Forest Hill, Galt, Georgetown, Geyserville, Hanford, Jenny Lind, Knights Ferry, La Grange, Live Oak, Mokelumne Hill, Murphys, Nevada City, Oakdale, Orland, Point Arena, Quincy, Red Bluff, Roseville, Sebastopol, Snelling, Sonoma, Truckee, Wheatland, Woodbridge, Woodland, Yreka
Historic IOOF Buildings in Nevada
Austin, Gardnerville, Nevada, Yerington
Historic IOOF Buildings in Oregon
Ashland, Coquille, Gold Hill, Klamath Falls
Historic IOOF Buildings in Utah