New York has long been a city in the clouds, but with 16 buildings around 500 feet or taller slated for completion this year, 2019 could be the city’s busiest year ever for new skyscrapers.

For many years the city’s skyline was primarily defined by the Empire State and Chrysler Buildings, both over 1,000 feet tall and built in the early 1930s. But New York’s horizon has been in perpetual flux now for the better part of a decade.

There are currently nine completed towers in New York that are over 1,000 feet tall, and seven of them were built after 2007. Nearly twice that many — another 16 such towers — are being planned or are under construction, according to the Council on Tall Buildings and Urban Habitat, a Chicago-based nonprofit that tracks high-rise construction.

The scale of this new wave of construction is unprecedented.

New York’s skyline looks starkly different than it did a decade ago, redrawn by the massive Hudson Yards project on the West Side of Manhattan; a profusion of towers on and around Billionaires’ Row in Midtown; and the revitalization of Lower Manhattan, with One World Trade Center leading the way. The recent rezoning of Midtown East will cut even more of the skyline into unfamiliar silhouettes. And new heights will soon be reached in Brooklyn and Queens as well, thanks to luxury apartment high-rises.