Don't classical guitars have position markers?

Most acoustic guitars have position markers on the top and side of the fingerboard. It is normal for these guitars to have such marks on the 3rd, 5th, 7th, 9th, and 12th frets.
However, it is not out of the ordinary for entry-level classical guitars to have position markers on the side of the fingerboard on the 5th, 7th, 10th, and 12th frets (some may have fret markers only on the 5th and 7th frets). High end classical guitars generally do not have any position markers whatsoever. As with instruments in the violin family it seems that, traditionally, classical guitars did not have position markers.
Position markers are very handy for guitarists who are still learning the basics. Actually, even some professional musicians apply their own markers to their guitars!