Hundreds of playbills mostly from 19th-century New York theater performances will be restored and digitized, thanks to a grant by the National Endowment for the Humanities to the Museum of the City of New York.

The museum’s collection consists of about 700 of these broadsides, many of which are extremely fragile; all of them will be digitized, while half of them will go through a conservation process. The N.E.H. has given $143,804 for this project.

“A lot of the pieces have bits barely hanging on by a thread,” Morgen Stevens-Garmon, the project’s director and an associate curator of the museum’s theater collection, said in an interview.

These one-sheet playbills trace the history of theater in New York. They were originally posted around Manhattan to advertise Shakespeare plays, minstrel shows, new American plays and early musicals. One showcases a performance of “The Black Crook,” which opened in 1866 and is often credited as the first musical. The earliest broadside in the collection advertises the Old American Company’s performance of “The Merchant of Venice” in 1785; tickets were four shillings for a gallery seat.