I play the acoustic guitar - there are 3 main times of this guitar -  the classical guitar, the steel-string acoustic guitar, and the archtop guitar.
I thought there was just typically one type of guitar so that's interesting
It is also interesting that today's guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, and the five-course baroque guitar
Can you perhaps explain to me what a gittern is?
A gittern was a fairly small gut strung round-backed instrument from around the 13th century
okay so kind of like an old ukelele? If that's a fair comparison
, the gittern is considered an ancestor of the modern guitar and other instruments like the mandore, bandurria and gallichon. 
From the early 16th century, a vihuela shaped (flat-backed) guitarra began to appear in Spain, and later in France, existing alongside the gittern. Although the round-backed instrument appears to have lost ground to the new from which gradually developed into the guitar familiar today, the influence of the earlier style continued. Examples of lutes converted into guitars exist in several museums, while purpose-
type of chordophone, traditionally constructed from wood and strung with either gut, nylon or steel strings and distinguished from other chordophones by its construction and tuning. The modern guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, and the five-course baroque guitar, all of which contributed to the development of the modern six-string instrument.
There are three main types of modern acoustic guitar: the classical guitar (Spanish guitar/nylon-string guitar), the steel-string acoustic