Your meeting point is on Monastiraki Square, outside the bakery/patisserie “Veneti” (BENETH in Greek)
It is a very central place and you can get there easily by metro choosing the Blue or the Green line (MONASTIRAKI Station).
If your hotel is in central Athens and within 10–15 minutes of the tour’s starting point, your guide will meet you directly at your hotel. Otherwise, you will meet your guide at the location arranged with your travel designer.