28:36 · This combination of a Maltese cross and St. George's cross is sometimes called a Greek cross. In this structural group of graphs there are no less than three different cross designs called Greek crosses.
    This type of cross was quite common in Scandinavia during the Viking era, for which one of the reasons might be the export of young Vikings from Sweden to Miklagard (Constantinople), during the centuries around A.D. 800, for service in the guard protecting the Byzantine emperor and his glorious city at the Golden Horn.