Complex sentence: The houses inside were built on pillars and were 10--13 metres high, with wooden floors covered with fine mats on which people sat. Roofs were made from wooden shingles and the dwellings of the common people were roofed with straw.
Split into simpler sentences: The houses inside were built on pillars and were 10 to 13 metres high, with wooden floors covered with fine mats on which people sat. Roof were made from wood shingles. The dwellings of the common people were roofed with straw.