(Portland, OR)  --  Two downtown Portland buildings are now among those listed on the National Register of Historic Places.  The original Heathman hotel at 723 Southwest Salmon was built in 1926, and is now known as the Park Tower.  The Lexington Apartments at 1125 Southwest 12th Avenue went up in 1910, and were originally known as the Hanthorn Apartments.  Both buildings are operated today as affordable housing by Cedar Sinai Park.