Complex sentence: Velbastaður is located nearly in the center of the archipelago, and close to the old thing in Tórshavn across the mountain, which also again supports the idea that there has been a shrine at Velbastaður.
Split into simpler sentences: Velbastaður is located nearly in the center of the archipelago, and close to the old Thing in Tórshavn across the mountain. This would support the idea that there has been a shrine at Velbastaður.