STUDY THE STEPS OF THE THOUSAND YEAR UNFOLDING
You can let the computer run the playback of the unfolding automatically:   click here  . You can dynamically see the steps as they come into play.  
Or, you may control the playback of the unfolding: VERY slowly mouse-over the colored bars to the left, to view the cycles of unfolding at your own pace.

THE THOUSAND YEAR UNFOLDING OF ST MARK'S SQUARE FROM 560 AD TO 1600 AD.

The urban design process had a cycle of four basic steps which were repeated again and again. From 560 to 1600 there were roughly ten cycles.