 The most unusual are the Alaca Höyük bronze standards; bulls or stags on pedestals whose purpose remains the subject of debate.The standards are cast in copper, many in the form of flat circles, half-circles or squares that are filled with an openwork network of cross bars, central crosses, and swastikas.Leonard Woolley found that the Royal Tombs "seem to belong to the end of a period, as marked by a stratum of destruction and the burning of the citadel.