We don't happen upon many inspiring window mullions in modern houses, but they're a comforting detail of cottages and more traditional homes. A few gathered here for inspiration...
• 1 Wintry mullions in Lena's Family Home
• 2 Marjie's Cottage
• 3 with colored glass in a Queen Anne window, via Bay and Gable Victorian
• 4 Industrial era metal mullions in Thomas O'Brien's NYC apartment, via Strange Closets