Sonnets are poems from Italy, deriving from the word sonus, or sound in Latin. While they were very popular in Italy, they also gained popularity in other countries, most notable of which being England, with William Shakespeare. Sonnets are fourteen lines long and have very strict rules. The standard Italian sonnet's rhyme scheme is a-b-b-a, a-b-b-a. Meanwhile, the Shakespearean sonnet's rhyme scheme is a-b-a-b, c-d-c-d, e-f-e-f, g-g. They both follow an Iambic Pentameter.
Shall I compare thee to a summer's day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May,
And summer's lease hath all too short a date:
Sometime too hot the eye of heaven shines,
And often is his gold complexion dimmed,
And every fair from fair sometime declines,
By chance, or nature's changing course untrimmed:
But thy eternal summer shall not fade,
Nor lose possession of that fair thou ow'st,
Nor shall death brag thou wander'st in his shade,
When in eternal lines to time thou grow'st,
So long as men can breathe, or eyes can see,
So long lives this, and this gives life to thee.