Pink Floyd's guitarist, David Gilmour, sold his guitar collection for nearly $22 million at a Christie's auction in New York.
The auction was aimed at raising money to fight against climate change.
The auctioned collection consisted of more than 120 instruments, including his 1969 Black Fender Stratocaster which alone fetched $3.9 million.
The 73-year-old singer and guitarist stressed the current climate emergency was the "greatest challenge that humanity will ever face", warning against the "irreversible" effects of climate change.
"The choice really is that simple, and I hope that the sale of these guitars will help ClientEarth in their cause to use the law to bring about real change,” he noted.
"We need a civilised world that goes on for all our grandchildren and beyond in which these guitars can be played and songs can be sung."