A tholos (sometimes tholus, from Ancient Greek θ?λος) is an ancient Roman feature found in the macellum. It is a round structure, usually built upon a couple of steps (a podium), with a ring of columns supporting a domed roof.

Tholos
Tholos
El "tholos"del Cerro de la Cabeza, en Valencina de la Concepción (Sevilla)
The Structural Mechanics of the Mycenaean Tholos Tomb
From tholos tomb to Throne Room: some considerations of dawn light and directionality in Minoan buildings
El Tholos de las Canteras y los enterramientos del Bronce en la necrópolis de El Gandul (Alcalá de Guadaira, Sevilla)
The use of Tholos software for combining measures of mental workload: toward theoretical and methodological improvements.
Studies in Iberian Archaeoastronomy: (2) Orientations of the Tholos Tombs of Almería
Chevalier, A.: The use of tholos software for combining measures of mental workload: Toward theoretical and methodological improveme...
Marine bioerosion in rocks of the prehistoric tholos of La Pastora (Valencina de la Concepción, Seville, Spain): archaeological an...