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Types of French Doors | Internal French Doors
Types of French Doors | Internal French Doors
The door which is made out of glass panels for most of its length with a wooden or any other materials frame is called a French door. A French door is a very light structure or door compared to other types of doors.
 

In the 16th and 17th centuries, the French doors were first introduced in France which is why it is called the French door. Also in some places, French doors are called French windows because of their shape.