Looks like probably that's it.
It may be an optical illusion, but to my eye it looked like there was a line extending downward at far left and this I took to be a
column. It may also rerpesent the edge of the temple itself. In any case, ten columns makes more sense.
Temples could have any number of columns. Typically depictions on coinage show multiples of two: four columns, six, eight, and ten. Other numbers, including odd numbers, of columns are sometimes found also, but much less commonly.
Going back to your original question,
city gate (a.k.a.
campgate)
types show structures that are more akin to fortress towers with an arched gate at ground level.
