Fill in the Blanks Muslim artOnline version Complete the blanks by Laura Indiano 1 marble vaulted purify Koran fountain Muhammad´s kiblah geometric Koran horseshoe pillars coloured Medina Mecca mosque external colums mihrab courtyard They used and to support the arches and flat or roofs . The decoration was simple , but inside , they were covered with and tiles . There were usually decorations of vegetables , figures and inscriptions from the . The is the most important building for Muslims and its structure is based on house in . It has a surrounded by a portico . There , it was a were they could wash and themselves . The hall of prayer is a covered area with arches and colums that divide the space . One of the walls , the faces . On that wall there was a niche , the , were the is kept .