A pergola (framework/trellis), Latin "Pergula" refers to a projective eave, is a garden feature creating a shaded pathway, or sitting area on pillars. A pergola is built to support cross-beams and a durable open framework, often upon which climbers and creepers are draped.
As a gazebo, it is often found as an extension of a structure, as well as a sheltered area on an open terrace or patio.
Fine-looking pergolas on brick and stone pillars replaced traditional pergolas in the early 18th century.
Pergolas are often erected to form a link/connection between a pavilion and an open garden feature, such as a swimming pool or recreational area. Self-supporting/freestanding pergolas, provide a sitting area that allows one to enjoy the breeze and sunshine while offering 100% protection from harmful UV-rays.
Modern day pergolas are often made of wood pillars (and not the traditional brick or stone). This ensures an increase in popularity due to affordability. Generally, pergolas are built with weather-resistant wood, such as Western Red Cedar or Coast Redwood and are painted or stained.
In Australia we often refer to Balinese pavilions, gazebo's and Bali huts as Balinese Pergolas.