Referred to as NDK: En-De-Ka. Built in 1981 to mark the country’s 13th centennial, it is Sofia’s most prominent modern landmark, housing concert halls, exhibition space, offices, cafes, restaurants and more. Throughout the year (except August) it hosts a variety of cultural events from classical to avant garde; concerts, film festivals, art exhibits, fashion shows and trade fairs as well as major conferences. Hall 1 the largest of 12 halls, seats approximately 4000 and is used for major concerts, including international pop stars, as well as movie premieres. There are several live music clubs within the complex, but these are listed separately. The smaller halls 8 and 9 host classical recitals or chamber music. The various halls and foyers themselves are home to some of the most impressive specially commissioned contemporary art.