The Architecture of Bengal, which comprises the modern country of Bangladesh and the Indian states of West Bengal, Tripura and Assam's Barak Valley, has a long and rich history, blending indigenous elements from the Indian subcontinent, with influences from different parts of the world. Bengali architecture includes ancient urban architecture, religious architecture, rural vernacular architecture, colonial townhouses and country houses and modern urban styles. The bungalow style is a notable architectural export of Bengal. The corner towers of Bengali religious buildings were replicated in medieval Southeast Asia. Bengali curved roofs, suitable for the very heavy rains, were adopted into a distinct local style of Indo-Islamic architecture, and used decoratively elsewhere in north India in Mughal architecture.
Bengal is not rich in good stone for building, and traditional Bengali architecture mostly uses brick and wood, often reflecting the styles of the wood, bamboo and thatch styles of local vernacular architecture for houses. Decorative carved or moulded plaques of terracotta (the same material as the brick) are a special feature. The brick is extremely durable and disused ancient buildings were often used as a convenient source of materials by local people, often being stripped to their foundations over the centuries.