See also "Traveling carillons" below. The tower contains one of the only municipal carillons in the country. In 1628 he became the Director of the Carillons of Utrecht. In 1818, he moved to Modena, where he repaired Carillons and Tower Clocks. Carillon City's carillon is one of only four carillons in Australia. The carillon, built in 1972, was one of five carillons in Bavaria. So Alkmaar has three carillons related to de Haze. People put into this tower two carillons which are there up to this day. The Bell Tower, one of only five carillons in California, was built in this period. Only those carillons having at least 23 bells will be taken into consideration. Finally, the library includes information on North American and foreign carillons, individuals, and bell foundries. The Mafra carillons constitute the largest carillon ensemble in the world. Older carillons can be transposing instruments, generally transposing upward. Their two carillons contain a total of 92 church bells, founded in Antwerp. These carillons constitute the largest historical collection in the world.