Alexander so esteemed his painter that he presented Campaspe to Apelles as a reward for the portrait. The tale of Alexander and Apelles, a favorite of Renaissance and Baroque painters, celebrates the power and nobility of painting. Giovanni Battista Tiepolo painted this episode at least three times.
However even 18 hours is not considered abnormal for a Chihuahua. This includes naps.There are 2 types of sleeping. One is a lighter sleep (called slow wave) and the other is the deeper sleep (known as REM-Rapid Eye Movement). Dogs, just like humans do have these 2 different types of sleep.
Depends on the dog. If the dog has a job to do such as a guard dog. 8 to 10 hours would be about right. But dogs who are just pets and really do not have anything else to do can sleep as much as 16 hours in a day. Maybe because they are bored and a nap is just something to do. Average: 10 hours per day.