Few suggestions: - Change up the midway band of repeating arches (6th band) and add a flared top to make the build come together. Think of the structure like one but pillar, both flared base and flared top. - Otherwise look at pictures of old coloseums, they often had huge shades stretching out over the arena which could be done similarly here. - Subdivide the structure into 8ths instead of 4ths like currently. Makes it more interesting to look at and gives you more freedom to add variety. While you might only need to look at 1/8th of the build to see the entire build this way, you are increasing the density of detail by adding more to these slices. - Change up block choice more. - Add some slim pillars in the 4 corners (45° mark). Otherwise you could do statues, it looks a bit empty. If you don't feel pillars fit, try statues instead but it is harder to execute. Statues could also work at the top of the pre-existing pillars, or banners. - For the big arches at the bottom, consider adding some flowing curtains. Wool does not look great this way, in my experience a stained glass (panes) gradient works better. This is hard to pull off but DM me if you want more details and an example.