On December 21, 1913, the first known published crossword appeared in the New York World newspaper. It was the concoction of the journalist Arthur Wynne and appeared in a diamond shape. Today, in celebration, we're challenging you to complete our New York Public Library-themed crossword!

Fill out the puzzle online, or download the PDF to print if you prefer pencil-and-paper style. (Stumped? We'll post the answers Wednesday.)

Across

4. Last name of the first superintendent of the library
5. The Schwarzman Building was constructed on the site of the old ______.
8. Number of ex-Olympic athletes on the NYPL staff in 1926
10. Author who made his last public appearance at NYPL alongside Gunter Grass
12. Who you gonna call from this 1984 cult classic filmed at NYPL?
16. Architect responsible for converting Jefferson Market Library from a courthouse to a library
19. Branch library adjacent to Tappen Park and the Old Village Hall
20. Author whose crutches are held by NYPL
22. The original glum donkey is held by the Library with his friends Pooh, Tigger, Piglet, and Kanga
23. On ________30, 1929, the Main Reading Room has its busiest day in history
24. "Rip Van Winkle" author and president of the library's Board of Trustees from 1848-1859

Down

1. Type of marble used to construct Schwarzman Building exterior
2. There's the "Song of Myself" and there's the locks of his hair at NYPL.
3. Edward Land developed the process for the ______ Land Camera at the Library.
6. Author of Heir to the Glimmering World, a book set  partially at NYPL
7. This HBO Series starring Sarah Jessica Parker has filmed at NYPL
9. During WWII, _______ intelligence forces researched at the NYPL Map Division.
11. Branch library named after the first rector of Chelsea's Church of the Holy Communion
13. Donated $5.2 million to construct sixty-five branch libraries in 1901
14. Writer of 1493 letter held by NYPL, detailing "discovery" of New World
15. During the Subway Series of 2000, the southerly Lion donned a ________ baseball cap.
17. Barnes Avenue branch library in the Bronx
18. Last name of mayor who named Patience and Fortitude during the Depression
21. Author of The Feminine Mystique, which was written in the Library’s Frederick Lewis Allen Memorial Room