Pergolas can also cover a walkway ... times when they were attached to exterior walls and supported by pillars or columns.

Here's how they differ. A pergola is a tall yard structure composed of columns or pillars supporting an open crossbeam roof.

A pergola is a popular name for a canopy or extension. Originally, pergolas were invented to be used in gardening for climbing plants. Today, they are erected to protect a terrace or passage from the ...