The diverse origins of Malagasy culture are evident in its tangible expressions. The most emblematic instrument of Madagascar, the "valiha", is a bamboo tube zither carried to Madagascar by early settlers from southern Borneo, and is very similar in form to those found in Indonesia and the Philippines today. Traditional houses in Madagascar are likewise similar to those of southern Borneo in terms of symbolism and construction, featuring a rectangular layout with a peaked roof and central support pillar. Reflecting a widespread veneration of the ancestors, tombs are culturally significant in many regions and tend to be built of more durable material, typically stone, and display more elaborate decoration than the houses of the living. The production and weaving of silk can be traced back to the island's earliest settlers, and Madagascar's national dress, the woven "lamba", has evolved into a varied and refined art.