Alarm clock history

Alarm clock is a clock designed to create a loud sound at a particular time. The main use of an alarm clock is to wake people up at certain times, sometimes even for other types of work reminders.

The first adjustable alarm clock was invented in 1858 by Seth.E.Thomas. So before that time and from very far away, what did people use to wake up early?

Inforgraphic below will briefly introduce the history of alarm clocks from the earliest time to the present.