If someone thinks of the rhythm, the first thing that comes to his mind is the rhythm in Music, but did you come to your mind the rhythm in architecture?! Rhythm in architecture is like a visual rhythm that we find in design from a repetition of elements. Still, architectural blocks are designed to transfer the viewer's eyes to an architectural, musical piece very creative. this paper discovers the meaning of rhythm and types of rhythm and how it influences the design. Also, it is the focal point of this research. This research will explain the relationship between music and rhythm in architectural design. To understand it we will discover rhythm in great Egyptian architectural designed by the musical harmony.