April 19 will be the 60th anniversary of the NYC law that first allowed buildings, neighborhoods, and historic sites to be preserved through landmark designation. Six decades later, there are 16 historic districts, over 100 individual landmarks, and eight interior landmarks in our neighborhoods — including our city’s first designated landmarks, its most recently designated landmark, and a huge array of spaces, places, and structures designated during every decade in between.

Covering over 3,500 buildings, these landmark designations include everything from the city’s largest historic district to one of its smallest houses; the homes of radical revolutionaries and deeply entrenched institutionalists; churches and children’s charities; and bathhouses, banking halls, and bars.

Now you can explore them all, and see when and how those landmark designations took place over the past 60 years, with our new interactive Landmarks Timeline Map. This first-of-its-kind resource is the latest in dozens of interactive maps we’ve created, offering new insights into the rich and diverse history of our neighborhoods, and how we’ve been able to preserve it.