Mary T. Lewis writes, “At its most profound, and especially in [German painter Caspar David] Friedrich’s work, the motif of a view through an open window celebrated the utter subjectivity of the painter’s vision at the very threshold that divided his world and the realm of art from nature.” There’s an exhibit of Friedrich and his contemporaries at the Metropolitan Museum of Art. The articles has some nice pictures for those of us who aren’t planning to make it over to New York this year.