Honolulu Mayor Peter Carlisle signed a goodwill pact this week with an Australian city that has ties to surf legend Duke Kahana­moku.

Carlisle signed the agreement with Warringah Council Mayor Michael Regan Wednesday in front of the Kahanamoku statue in Waikiki.

Kahanamoku is known as the father of modern surfing who won multiple Olympic medals. He won three gold medals for swimming, two silver medals for swimming and one bronze for water polo.

Officials say that in 1915 he visited Warringah Council’s Freshwater Beach and introduced surfing to Australia.

The Honolulu mayor’s office says Honolulu is celebrating and strengthening its historical ties with Warringah Council by forming a "Goodwill Beach City" relationship.