Karatzis Group Crete’s Nana Princess Snags TÜV Austria “COVID Shield” Designation 6 years ago Karatzis Group's “Nana Princess Suites Villas & Spa” has received the designation "COVID Shield" by TÜV AUSTRIA. Karatzis Group’s Panellenic Airlines Takes Off in 2021 6 years ago Karatzis Group's Panellenic Airlines will take off in late 2020 or early 2021 as a private flights solution during the…