Many of the hundreds of lost mansions around the Twin Cities featured conspicuous towers, which were especially popular on houses built during the Victorian era.
The earliest towered houses here date to about 1860. Towers became much more common after 1870, when various picturesque Victorian architectural styles came to the fore.
Before the Victorian period, churches accounted for almost all of the towers in the Twin Cities. By the 1870s, however, towers were popping up on buildings of all types, including numerous mansions. The mania for towers reached its height, so to speak, in the 1880s, when the busy Queen Anne style was in full flower.
Victorian residential towers took many forms. In plan they could be square, rectangular, polygonal, circular or semi-circular. Their roofs also assumed many forms, from conic and bell shapes to steep, multi-dormered affairs resembling church steeples
Like the nonessential doodads they were, towers could be placed almost anywhere on a house. Some rose up front and center, others appeared to one side or another, sometimes at an angle, while still others lurked at the rear, no doubt to impress deliverymen. Their proportions also varied widely. Some were slender sticks that rose as high as five stories (well beyond the height permitted by today's zoning codes), while others were relatively short and squat.
Mansion towers usually had no dedicated function (unless they contained a staircase) and the space they provided more often than not was simply incorporated into adjoining rooms.
Alas, the towers were often more trouble than they were worth. They were hard to heat and cool and their roofs tended to leak. One way to deal with such problems was to lop off all or part of the tower, and Victorians that have undergone architectural surgery of this type can still be seen in older Twin Cities neighborhoods.
I'm not sure why the Victorians loved their towers so much (arguments regarding suppressed male sexuality will not be entertained here), but they certainly provided plenty of delightful street theater.