Ketchum is celebrating its 100th anniversary today by launching an interactive timeline to chart the progress that it has made since the May 22,1923 opening of Ketchum & MacLeod ad agency in Pittsburgh.

The firm also unveiled "Ketchum 100 Acts," a purpose-driven program that will encourage staffers to contribute 100 acts of giving back to support their communities or causes.

“We celebrate with gratitude the thousands of colleagues and clients whose many gifts built this exceptional agency, and will continue to evolve into the next century," said Mike Doyle, Ketchum CEO. "This is our time to move forward with intention, reminded today – as we are every day – that the special relationships we share among our colleagues and clients shape our culture and propel us to work harder every day to create work that matters."