the church clock, imported from germany has four lighted dials, and was brought along with a carillon of 25 bells playing 25 pieces both religious and popular music, such as: ave maría, the mexican national anthem, las mañanitas, guadalajara, adiós mariquita linda, las golondrinas, méxico lindo y querido, and the march of zacatecas. this chime can also be played from a keyboard in the choir. the cost of the clock was about 450 million pesos from 1972, (worth mxn$450,000 today), and was installed by german technicians. there is an interesting detail on the campanile which consists of miniature statues of the 12 apostles which rotate in and out of the tower whenever a musical piece is played.