Gelitin

Gelitin (stylized in lowercase) is a group of four artists from Vienna, Austria. The group was formerly known as Gelatin and changed their name in 2005. They are known for creating sensational art events in the tradition of Relational Aesthetics, often with a lively sense of humor.
Among their projects are a gigantic plush toy: a 55 meter tall pink rabbit on Colletto Fava (near Genoa, Italy), intended to remain there until 2025. In November 2005, the group had a show at Leo Koenig, Inc. in New York, a project called "Tantamounter 24/7". The project was a "gigantic, complex and very clever machine", according to the artists, which functioned as a kind of art-Xerox. The group erected a barrier blocking off one half of the space, locking themselves inside for one week, then asking visitors to insert items that they wanted copied into an opening in the barrier, which copies were then returned through another opening.
Works.
"The B-Thing".
One of Gelitin's best known art projects began in March 2000, when the group allegedly removed one of the windows on the 91st floor of the former World Trade Center complex and temporarily installed a narrow balcony, while a helicopter flew around the scene, taking photographs to be later documented in their book "The B-Thing". The book was published in 2001 and had even by that time taken on an air of urban legend, with new copies selling for $500 on "Amazon.com" as of 2016.
Other works include: