The arrangement of large buildings such as great buildings, event buildings, and the town hall can make or break your city design.
Many players, including experienced players with otherwise excellent city designs, situate the town hall in one corner and line up similarly sized great buildings along the same path. While not the worst design, this typically leads to a lot of unnecessary roads being built along the edges of the larger buildings.
Instead, group large buildings and connect them directly to your town hall with just one or two squares of road per three great buildings. For example, this city design connects Alcatraz, St. Mark's Basilica, and St. Basil’s Cathedral with just a single square of road. Similarly, Castel del Monte and Deal Castle are connected by two squares of road.
Eventually the town hall will run out of corners to accomplish such arrangements, but the above example also connects the Innovation Tower and the Cathedral of Aachen with just one additional square of road; however, it’s not ideal to have a road run along the entire side, especially the longer side of the Chateau Frontenac. Overall, this city demonstrates an extremely efficient way to place many large great buildings and event buildings with a minimal amount of roads. Compare this to an alternate arrangement where the town hall is placed in the top right corner with the buildings lined up on the top of the map. Just one great building could use four to eight pieces of road by itself!