Interior arches are:
Symmetrical - classic, pleasing to the eye - always a winner
Asymmetric ones are more risky, but if the angle of inclination, height, color of the arch fits the interior and will only improve it, the design of such an arch should be thought through.
Drywall - in this case, the doorway from above is limited to a semicircle in the arch. Most often, in this case, the resulting hole does not stand out from the interior and has the same color or is covered with the same wallpaper as the adjacent walls. The arch can be of an original shape or made in a classic style, with stucco, there is a wide space for imagination and design talent.
From the door frame - such arches are usually produced and installed by the same companies that install doors. Here, everything is limited by the width, thickness and curvature of the box, which brings the doorway into order.
The material of the door arches can be the same as that of the door - laminate, MDF, PVC, veneer and an array of various colors and shades, which allow you to choose an arch to match the interior and entrance doors.
The arch consists of several parts:
vault
side rack
decorative elements