Area between tholos and its porch, from the north, as found. 1: tholos floor, 2: porch foundation, 3: mass of loose stroses and earth, 4: fragmentary block of Eleusinian stone ... AMS Horizontal (normal) ... Area between tholos and its porch, from the north, as found. 1: tholos floor, 2: porch foundation, 3: mass of loose stroses and earth, 4: fragmentary block of Eleusinian stone.