Rhythm in Architecture
The photograph of the swallows on the wires makes a charming picture with its combination of life and geometry. It is a simple composition of four parallel lines on which a number of birds are perched against a white ground. But within the rigid rectilinear pattern the continuous flashing and fluttering of the birds are variations on a theme which give a completely cinematographic impression of the little flock in vivacious activity. You can almost hear their joyful chirps.
In the world of architecture you can also experience delightful examples of subtle variation within strict regularity. It may be a row of houses in an old street where dwellings of the same type and period were built individually within the framework of a general plan. These houses, too, are variations on a theme within a rectilinear pattern.