While doing some research on the Tunnel Depot in Port Huron recently, I found that it had been described more than once as Spanish Revival style. I found that to be very odd, and had doubts about another building description someone had shown me, so I decided to look into these things more (neither building is still standing, so one has to rely on whatever photos are available). Below is a photo of the Tunnel Depot, which is not a Spanish-based style.
Did “they” think it “Spanish” because it had curved windows and some stucco? Besides Mission (1890-1920) and Spanish Revival (1915-1940) styles having stucco walls, Tudor, Italian Renaissance, French Colonial, Modernistic, and International style buildings may also have walls of stucco. Curves, as in round arched windows, are common to many architectural styles of the last 100+ years, though arcades less so. Of course, Mission buildings usually have curvilinear gables (or roof parapets and dormers), making them distinct (although interestingly, Flemish gables can be very similar), whether they have any other curved elements or not (Figure 2; please find most of the figures after the body of text).
Spanish Colonial Revival style tends to have “fancier” (baroque) elements and is usually not so cube-like as the Mission style (Figure 3). Both styles have stucco walls and are annoyingly similar, but Spanish Colonial Revival roofs are much more straight-edged than the curvilinear Mission. To up the confusion, some architectural style references claim they are the same style . . . this type of joining and parting is not at all unusual amongst the many architectural styles sources. And yet there is more to add to the confusion: in the 1910s architect Irving Gill introduced his own brand of Mission that was “radically simplified” (Figure 4), and in this author’s view, tended to resemble the upcoming Spanish Revival more. In any case, Gill’s modernization of the Mission Style was highly respected and no doubt copied widely. The simplified rear arcades of the former Gratiot Inn (1917-1969) are reminiscent of Gill’s work, while the front of the structure was in the traditional Mission Style (photos of this building are hard to come by, but a number can be viewed in this video: https://youtu.be/OBCUL3wqulQ .*
Other styles of buildings that have curves (like towers or wall “corners”), which are not normally confused with “Spanish” are Queen Anne, Tudor, and Art Moderne, so I will not be addressing those styles further. Well, except that the Tunnel Depot, already pictured, appears to be Tudor or a Tudor with additional elements, and it was confused with Spanish Revival (an article from 1975 says “renaissance,” but that may have been in error since that style is centuries old). So besides Mission Revival (which is very rare in this area) and Spanish Colonial Revival (again, very rare), what building styles with round arches might be found in Port Huron and environs?
The arch, of course, is Roman in origin (well, they invented the weight-bearing arch). And Rome is in Italy, so styles with arches tend to be Roman or Italian of some sort. The oldest style that starts to get its curve on is Italian Villa (1837-1880), and there appear to be some homes of this style still standing in Port Huron; the example in Figure 5 has many round-top windows. Italianate, 1840-1885, soon followed (Second Empire, 1855-1885, buildings have perhaps even more curved elements), and examples are easily seen in Port Huron. Most curves are found in one or more floors of arched windows. Many Italianate buildings actually did not have that much in the way of curvature, but the two upper stories in the Port Huron example have two different types of curved windows (Figure 6).
There are a very small number of Richardsonian Romanesque (~1877-1900) buildings in Port Huron, and arches are an identifying feature of this style (note the Roman reference right in the name). These relatively distinctive and heavy structures of stone are normally not confused with other styles (Figures 7 and 8). (Victorian Romanesque, 1870-1900, was even more curvy.) Buildings in the Italian Renaissance style, 1890-1935, may have lots of arched windows and an arcade (or they may not) (Figure 9).
So if you see a building with a row of arched windows, or an arched opening or two (doorways and porticoes), or a row of arches that make up an arcade, what style might it be? Something to consider is that it may just be a vernacular building—one designed and made by a local builder, not an architect—which contains certain style elements but is not an example of a certain architectural style in its entirety (the Harrington Hotel is one such example of mixed styles). It might be one of the styles included here, but then again many styles of architecture use arched windows. If you see a building with such windows and it doesn’t really look like any of the styles here, then it’s probably not a Spanish- or Italian-based style.
* The Gratiot Inn’s last summer season was in 1969, and new owners converted parts of the Inn into condominiums in 1970-1971. Source: various contemporary Times Herald articles. Also, many news articles quote people who say that the Gratiot Inn was built over the ashes of the Windermere Hotel, but that simply isn’t true. It doesn’t help at all that the condominiums were named Windermere for some strange reason. The Windermere was on a different property and burned in 1920, and the Gratiot Inn was opened in 1917.