The alternating white and blue stripes are mentioned to depict the 9 syllables on the phrase "Eleftheria i thanatos" ("Flexibility or Death"), a well known motto in the course of the Greek War of Independence. Through the Kingdom of Greece, a crown was extra in the centre from the cross. https://medieval-times-flags00724.targetblogs.com/33572502/medieval-fantasy-banners-fundamentals-explained