Complex sentence: Built near the western edge of the valley which separates between the Tuwaiq Mountains and the city limits east of the residential area was a large market, 30.75 m in length from west to east, and 25.20 m north to south.
Split into simpler sentences: Built near the western edge of the valley which separates between Tuwaiq mountains and the city limits east of the residential area. It was a big market with 30.75 m length from west to east, and 25.20 m north to south.