Paul Allen’s Legacy of Extraordinary Homes

When Microsoft co-founder Paul Allen died in October at age 65, he left a cache of real-estate treasures, from a 4,000-acre Idaho retreat with meadows, trees, forestland and views of the Tetons, to a penthouse in a coveted Manhattan building, to hundreds of acres on a peninsula in the San Juan Islands, replete with custom- designed homes, huge gyms and swimming pools, libraries and music studios.