Sliding door 

Roman sliding door tracks at Pompeii, Italy (1st century AD).

A sliding door is a type of door which opens horizontally by sliding, whereby the door is either mounted on or suspended from a track. Types of sliding doors include pocket doors, Arcadia doors, and bypass doors. Sliding doors are commonly used for shower doors and wardrobe doors.

History

Sliding doors were used as early as the first century CE in Roman houses as evidenced by archaeological finds in Pompeii, Italy.

See also

Arcadia door

Sliding doors in a modern wardrobe.

Modern Manufacturers

"Portman pocket doors," Sliding pocket doors http://www.portman-pocketdoors.co.uk/pocket-door-system/

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