What would Olmsted do now? That’s the question designers attempted to answer as they created a new landscape for the Richardson Olmsted Complex, a National Historic Landmark. The designers wanted to remain true to the original intent of acclaimed landscape architect Frederick Law Olmsted while addressing concerns of the 21st century. You can see the new landscape during an event for the public called South Lawn Celebration from 11 a.m. to 4 p.m. Saturday, Sept. 28 at the complex, 400…