The dome is the anchor
Positano is a mass of small pale rectangles, and a mass of small rectangles has no focal point. The majolica dome of Santa Maria Assunta solves that. It is the only curved, patterned object in the whole town, so the eye goes to it immediately and everything else arranges itself around it.
The print places it slightly below centre, which is where it actually sits — low in the town, close to the water. Putting it dead centre would be tidier and completely wrong.
Foreground as a frame
The bougainvillea in the lower right is doing structural work, not decorative work. Golden-age posters routinely used a branch, a railing or a figure in the near foreground to establish depth without perspective tricks — one object close, everything else far.
It also stops the composition from sliding out of the bottom corner. Without it, the beach and boats would drain the eye off the edge of the poster.
Where it works on a wall
The strong vertical makes this one of the easier prints to place: narrow walls, the space between two windows, or a stairwell where you look up at it.
It is the natural companion to the Amalfi Coast print — one town in detail beside the coastline it belongs to. Cinque Terre makes a good third if you want the Italian coast in sequence.
