With the advent of the clock, a springboard for a new vision and perception of time, you start a new process of invention, to which many have contributed the most original and brilliant contributions.
The clock which is dealing with here is mechanical, to distinguish from other instruments for measuring time such as the hourglass or a sundial, as characterized by a self-sustaining mechanism of the watch is not dependent on external factors such as light day or in the presence of someone who restarts the transfer of sand.
The development of the mechanical clock occurs during the first half of the second millennium of the Christian era, when the major mechanisms were prepared from the bell tower, which offered a viewing distance of the passing of the hours and pace of life, the existence of men and communities, punctuated by the deep tolling of their bells.
However, the first real tool for mechanical watchmaking, universally recognized as the true ancestor of the clock, appears shortly before the year one thousand in the form of ‘svegliatore monastic’, a device used in monasteries and convents of Europe as a mark-time, the Like an hourglass or a sundial, to report, with the flick of a bell attached, the beginning of the moments of prayer and work. Unlike sundials and hourglasses, however, the monastic svegliatore is already a device independent, however rudimentary, completely mechanized.