North Macedonia has a rich cultural heritage in art, architecture, poetry and music. It has many ancient, protected religious sites. Poetry, cinema, and music festivals are held annually. Macedonian music styles developed under the strong influence of Byzantine church music. North Macedonia has a significant number of preserved Byzantine fresco paintings, mainly from the period between the 11th and 16th centuries. There are several thousands of square metres of fresco painting preserved, the major part of which is in very good condition and represent masterworks of the Macedonian school of ecclesiastical painting.