What is Joglo?

Joglo is a type of traditional vernacular house of the Javanese people (Javanese omah).  One of Indonesian culture. The word joglo refers to the shape of the roof. In the highly hierarchical Javanese culture, the type of roof of a house reflects the social and economic status of the owners of the house; joglo houses are traditionally associated with Javanese aristocrats.

Joglo rooves can be implemented on a dwelling (omah) or a pavilion (pendopo).

Joglo roof consists of columns that become higher as it goes to the center. The four innermost main house columns are often the tallest, while the outer columns are the lowest. These four innermost house columns support a roof that is the steepest of all types of Javanese roof; almost forming a pyramid, except that it comes to two points rather than a single one. These four innermost main house columns are surmounted by a unique structural element known as tumpang sari. A tumpang sari is a layered beam structure; the outermost band of beams supports the rafters of both the upper and lower roofs, while the heavily ornate inner band of beams creates a vaulted ceiling in the form of an inverted stepped pyramid.

source : Wikipedia