on top of the palace is a large domed cupola, topped by a weather vane in the form of a cog ship. this ship is a symbol of amsterdam. just underneath the dome, there are a few windows. from here one could see the ships arrive and leave the harbour. in the cupola is the famous carillon by françois and pieter hemony cast in 1664 in amsterdam. it was renovated by eijsbouts in 1965. only 9 bells by françois and pieter hemony remained. 38 new bells by eijsbouts were made and tuned in meantone temperament. the old corroded hemony bells are kept inside the palace.