• Single Organization Support

• 298.

Wisconsin Historical Real Estate Foundation Inc

Official Twitter feed for members of the Wisconsin Historical Society.

• Astronomy (includes Observatories)

• 299.

Nebraska Star Party Inc

Nebraska Star Party is one of the nation's premier stargazing events held under the dark skies of Nebraska's beautiful Sandhills The Nebraska Star Party Next Star Party July 20th 25th 2025 Location Merritt ReservoirValentine Nebraska Online registration is now open Discover the Wonders of the Night Sky Join us at the Nebraska Star Party for an unforgettable week of stargazing family fun and natural beauty at Merritt Reservoir.

City of Omaha Public Library Foundation

The mission of the Omaha Public Library Foundation is to raise funds and advocate for Omaha Public Library.

Preservation Sos Inc

Historic Preservation in Springfield: a neighborhood in the Urban Core of Jacksonville, Florida.

• Historical Societies and Related Activities

• 302.

Mondak Historical & Art Society

Our mission is to engage, educate, and inspire our community by preserving and contributing to the area's arts, culture, and heritage.

• Historical Societies and Related Activities

• 303.

Historical Society of Delaware

To share our love of and get people excited about Delaware history.

• Children's Museums

• 304.

North Platte Area Childrens Museum

THROUGH THE USE OF EXHIBITS AND OTHER ACTIVITIES, THE MUSEUM PROMOTES LEARNING IN THE AREAS OF ARTS, SCIENCES, TECHNOLOGY AND CULTURES FOR CHILDREN AGES 6 MONTHS TO 12 YEARS.

• Museums & Museum Activities

• 305.

HEARTLAND MUSEUM FOUNDATION INC

By appointment October - May 515-602-6000.

National History Day Inc

National History Day administers a competition that challenges middle and high school students to discover and experience history for themselves.