The iconic NBC building in New York’s at 30 Rockefeller Plaza, affectionately known as “30 Rock,” has officially been renamed the “Comcast Building,” NBC Universal said Wednesday.

NBCU and its parent Comcast unveiled the new granite pier naming stones located at the entryways to the building earlier today. Comcast NBCU rooftop signage – featuring the Comcast logo on the north and the NBC Peacock on the western facing rooftop façade, will be illuminated this evening (July 1). According to Comcast, it marks the first time that the NBC Peacock will be placed atop the building.

The date of the unveiling has historic significance for NBCU – on July 1, 1941, 30 Rockefeller Plaza was home to the first commercial television broadcast with WNBC (then WNBT) offering a lineup that included a Brooklyn Dodgers vs. Philadelphia Phillies baseball game and Lowell Thomas reporting the news from Studio 3H.

Here are some other additional facts about the iconic building:

* Comcast Building is the third name of iconic 30 Rockefeller Plaza. RCA, the company that founded NBC, had its letters atop 30 Rock beginning in 1937. The building was renamed for GE in 1988, two years after the company re-acquired RCA. In 2013, Comcast NBCUniversal announced it had purchased from GE the properties used by NBCUniversal at 30 Rockefeller Plaza.

* The signage utilizes custom energy-efficient LED lights that mimic the exposed neon look of previous 30 Rock rooftop signs.

* On the north and south sides, the Comcast letters are 12 feet tall crowned by an 11 foot high NBC Peacock. The western facing NBC Peacock is 18 feet tall.

For video of the new signage, please visit NBCUniversal on Facebook: