‘Internal windows can be tricky to get right, and a porthole window is a more playful way to connect two spaces than a rectilinear one,’ says Tom Surman, director at London’s Surman Weston.

The openings bring natural light into the interior and maximize the connection of the project to the surrounding garden. Related: 6,000 Circular Windows Flood Japan’s Kanazawa Library With Light ...

From circular openings in an Indonesian dwelling to the lofty skylights of an English barn-style house, our latest lookbook features 10 residential interiors with striking windows.

Shaker craftspeople often included interior windows to let daylight into rooms that would otherwise be dark. They dubbed the resulting effect “borrowed light.” ...

The windows are double-paned, which minimizes noise and energy consumption. Also included is an 18,000 BTU air conditioner and heater to keep the interior comfortable all year long.

Design How to Stylishly Bring More Sunlight Into Your Home Design pros are turning to a chic alternative to the roof-puncturing skylight: the interior window. Here’s what you need to know.