The Carnegie Science Center teased that a mysterious and transformational announcement was coming Tuesday afternoon, and boy were they were not kidding.

Bigwigs from both the North Shore museum and the Carnegie Museums of Pittsburgh — the consortium of four local museums that includes the Science Center — were on hand as the Science Center announced that it had recently received an unprecedented $65 million gift from Shadyside-based couple Daniel and Carole Kamin.

That’s by far the largest monetary donation to the Science Center since its founding in 1991, according to Jason Brown, the Science Center’s Henry Buhl Jr. director and Carnegie Museums of Pittsburgh’s vice president. It’s also the biggest gift given to any entity within the Carnegie Museums of Pittsburgh since Andrew Carnegie’s original 1895 contribution, according to CMOP president and CEO Steven Knapp.

Going forward, the museum that used to bear Mr. Carnegie’s name will be known as the Daniel G. and Carole L. Kamin Science Center.