=Buildings.= The buildings of the highlands were of stone, while on the coast stone was used for foundations and brick made of clay mixed with reeds or tough grass was used for the walls. With stone mortar was sometimes used and sometimes not. In the great buildings where large stones were placed in the walls no mortar was used, and it is stated that in some of the remains of such buildings the stones are fitted so closely that not even a knife-blade can be inserted in the joints. The exterior walls were often of great thickness and the interior of the building was arranged around a court, with windows and doors from the rooms opening on to the court. Some of the buildings were of immense sizes, in particular those built as fortifications and for religious purposes. The doors were narrowed at the top, and with a stone across the top, the arch with the keystone not showing in Peruvian architecture. The roofs were thatched and in the large buildings the ceilings sometimes were vaulted by having the upper courses of masonry overlap and the whole topped by a single slab, thus forming a kind of arch. On this lower part a second story was built, which did not open on to the first floor, but was approached from the hill against which the building was built. Inside the building the walls were niched for the purpose of decoration and also gold plates and jewels were placed on the walls as ornaments. =Dress.= The two principal garments of the ancient Peruvians were the tunic and the robe. In the simplest form the tunic consisted of an oblong piece of cloth, folded crosswise in the middle and a piece cut out of the fold for the head to go through, and the edges on each side sewed together except a place left for the arms. Sometimes the tunic was made with short sleeves. Often a belt was worn about the tunic at the waist. In the coast country the material used for clothing was cotton while wool was used in the highlands in the interior. The quality of the clothing differed with the rank of the wearer, the coarsest clothes were used by the common people while the finest were reserved for the nobility and the very finest for the sovereign. The cloths were colored and designs woven in them and sometimes they were fringed and embroidered and sometimes even they were further decorated with feathers and small plates of silver and gold.