Press photo courtesy Lehigh Financial Group LLC Aiden Henninger, 24, a lifelong resident of Bethlehem, has purchased 546 Main St. in Historic Downtown Bethlehem for $1 million. The four-story building is home to Mama Nina's Italian restaurant and has three two-bedroom apartments on its upper floors. The restaurant will remain and Henninger plans to renovate the apartments and lease them. A graduate of Lehigh University, Henninger has been investing in real estate in Bethlehem for the last three years and has bought and renovated several homes, some of which he resold and some of which he rents. The real estate acquisition was announced by Jeff Barber of Lehigh Financial Group LLC, in Allentown.