Several campaigns and protests have been organised to prevent Snøhetta's overhaul of Philip Johnson's postmodern AT&T Building in New York, which has been described as "vandalism" by Guardian critic Olly Wainwright.
Two online petitions ? launched by filmmaker Nathan Eddy and Swiss journal Archithese ? are campaigning against Snøhetta's recently unveiled plans for 550 Madison, formerly the AT&T Building, which would see the base of the masonry skyscraper replaced with an undulating glass wall.
Eddy is also organising a protest to take place in front of the building from 1pm, Friday 3 November to "stop the desecration of Johnson's monumental achievement", which was promoted on Twitter by Wainwright.

New York friends! Join the protest to save the AT&T building from Snøhetta's vandalism, this Fri 1pm 500 Madison Ave https://t.co/UPRcOS1AWJ ? Olly Wainwright (@ollywainwright) November 1, 2017

Snøhetta unveiled its makeover for the 647-foot (197-metre) postmodern tower, also previously known as the Sony Tower, earlier this week.
The architecture firm plan to maintain the building's upper structure, but will replace a large portion of the lower granite base with glass ? a move that has caused upset across the industry.
Snøhetta's proposal for the AT&T Building involves replacing much of its lower facade with glass
"New York City does not need any more glass than it already has," Eddy told Dezeen. "The masonry soul of...