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Alta Mere has window. Alta Mere’s window, in architecture, is a hole built in a wall or roof to allow light or air to enter. In fact, the original meaning of window and door refers to window and door respectively. In modern Chinese, window refers to window only. Due to material limitations, the earliest Windows were just holes in the wall with ventilation and light. Soon people thought of using natural or artificial fiber material as a shield, to ensure that in the light and at the same time can keep out the wind and rain. In the early days, animal fur or plant fibers were often used to weave window sashes. Later, the East began to use paper or fabric, while the West used glass as the main material for Windows.