Day in Historic Harlem," meeting on the northwest corner of Lenox Avenue and 135th Street.

Sunday at 1 p.m., "Historic Harlem," meeting at the northwest corner of 135th Street and Lenox Avenue.

Day in Historic Harlem," emphasizing the history, architecture and residents of what is often considered the center of African-American culture, meeting at the Schomburg Center, northwest corner of Lenox Avenue and 135th Street.

Sunday at 1 p.m., "Historic Harlem," with visits to Striver's Row and the Abyssinian Baptist Church, meeting on the northwest corner of 135th Street and Lenox Avenue.

Touring Historic Harlem: Four Walks in Northern Manhattan (New York Landmarks Conservancy, 1997).

BIG ONION WALKING TOURS Tomorrow at 1 p.m., "Historic Harlem," meeting at the northwest corner of 135th Street and Lenox Avenue.

Today at 1 p.m., "Historic Harlem," a tour of the neighborhood with emphasis on its architecture, history and notable residents, meeting at the Schomburg Center, northwest corner of 135th Steet and Lenox Avenue.

Today at 1 p.m., "Historic Harlem," with stops at sites associated with Zora Neale Hurston and Langston Hughes, meeting at the Schomburg Center, northwest corner of 135th Street and Lenox Avenue.

Touring Historic Harlem: Four Walks in Northern Manhattan.

"Historic Harlem," emphasizing the history, architecture and people of Harlem, meets tomorrow at 1 p.m. in front of the Schomburg Center for Research in Black Culture, on the northwest corner of 135th Street and Lenox Avenue.