Just a couple months ago, a house by Frank Lloyd Wright’s son Lloyd—the Moore House—was destroyed in Rancho Palos Verdes, California. AN called its loss the “archi-crime of the year,” but now developers in Phoenix, Arizona could one-up the razing with the demolition of an original Frank Lloyd Wright designed for another of his sons, David. The threatened David Wright House is a spiral-planned textile block masterpiece that predates the Guggenheim (the most famous Wright spiral), and an effort is underway to save the property.

A petition from the Frank Lloyd Wright Building Conservancy urges the City of Phoenix to designate the structure as a historic landmark, preventing its destruction. According to the conservancy, no Wright house has been willingly destroyed in nearly 40 years. At press time, just under 800 names are still needed on the petition to reach its goal of 5,000 names. The conservancy has already helped the house receive a temporary stay of demolition while the city desides what to do, but time is running out. You can sign on with your support here.

According to the FLLW Building Conservancy, developers hope to demolish the home as soon as possible and build two luxury mansions on the site. You can stay up to date with the preservation process and read more about the conservancy’s efforts on their website.

[h/t ArchDaily]