A joint venture of Brookfield Property Partners and AustralianSuper has acquired 15 Broad St. in downtown Boston for $33 million.

The 10-story, 73,500-square-foot office building was built in 1920. It last sold for $9.7 million in 2007, according to records compiled by The Warren Group, publisher of Banker & Tradesman.

CBRE/New England’s Dave Pergola and Brian Doherty represented the seller, Boston-based Broder Properties, and procured the buyers.

“The Boston office investment market continues to perform strongly when compared to other top U.S. cities,” Doherty said in a statement.

Foreign funds have accounted for many of the highest-ticket investment sales in the downtown market in recent years.

Retirement fund AustralianSuper has $91 billion under management. Last spring, it paid $296 million to acquire a 49 percent stake in Brookfield’s 75 State St. office tower, which contains 841,000 square feet of class A office space.