Many buildings today are based on Islamic culture and architecture including many in Mecca and places all over the world matter a fact are numbers are based on the Arabic numerals also a lot of Islamic building designs were made in Europe after the Crusades.
The term Islamic art not only describes the art created in the service of the Muslim faith but also characterizes the art and architecture created in the lands by Muslims. Islam promoted the development of a unique culture with its own unique artistic language that is reflected in art and architecture throughout the Muslim world.
The religious buildings known as mosques, where Muslims worship, are among the most important examples of Islamic architecture. Other kinds of buildings include madrasahs, or religious schools; tombs; and palaces.
Apart from architecture, the arts produced in the Islamic lands follow a different formal hierarchy than that of Western art, where painting and sculpture are the two most important forms and are used to make religious images for worship.
These forms play a relatively minor role in Islamic art, where instead the major forms of artistic expression are the arts of the book, textiles, ceramics, woodwork, metal wares, and glass. - CourseHero.com
See examples of Islamic art and architecture at List25.com and Riyahigallery.com.