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Parade in Athens in honor of George I. On horses, from right to left, the Crown Prince Constantine, the future king, King Paul of Greece, Prince Pierre and myself. I have always hated horses. Mounting a horse was always a nightmare, particularly on this day. I was worried over the smallest mishap, and the ridicule that a fall might provoke. #photographscollection

A post shared by Prince Michael of Greece (@michaelofgreece) on Jan 23, 2016 at 10:21am PST

Embed from Getty ImagesEmbed from Getty ImagesMarlene A. Eilers Koenig Collection / Princess Tatiana Radziwill

Royals from around Europe attend a Series of Commemorative events, including a parade, lunch, and service, in Athens on this day in 1963, as part of a series of celebrations marking the Centenary of the Accession of King George I of Greece, following a Banquet and preceding a Gala. Royal Attendees included Princess Andrew of Greece, The Margrave of Baden, Crown Prince (now King) Harald of Norway, Princess Sophie of Greece (now Queen Sofia of Spain), King Paul of Greece (wearing the Order of the Redeemer and the Order of Saints George and Constantine), King Frederik IX of Denmark, Princess Anne Marie of Denmark (now Queen Anne Marie of Greece), Crown Prince (now King) Constantine of Greece, Crown Princess (now Queen) Margrethe of Denmark, Prince Georg Wilhelm of Hanover, Prince Michael of Greece, Margarita Princess of Hohenlohe-Langenburg, Princess Eugenie of Greece, Princess Irene, Duchess of Aosta, Princess Paul of Yugoslavia, Queen Frederika of Greece (wearing the Greek Emerald Tiara as a necklace), Queen Ingrid of Denmark, Queen Helen of Romania, Lady Katherine Brandram, Princess Theodora, Margravine of Baden, Princess Sophie of Greece and Hanover, Princess Tatiana Radziwill, Princess Irene of Greece, and Princess Benedikte of Denmark.

RW