The coat-of-arms consists of the traditional red and white squares or "grb", which simply means 'coat-of-arms'. It has been used to symbolise the Croats for centuries; some speculate that it was derived from Red and White Croatia, historic lands of the Croatian tribe but there is no generally accepted proof for this theory. The current design added the five crowning shields, which represent the historical regions from which Croatia originated. The red and white checkerboard has been a symbol of Croatian kings since at least the 10th century, ranging in number from 3×3 to 8×8, but most commonly 5×5, like the current coat. The oldest source confirming the coat-of-arms as an official symbol is a genealogy of the Habsburgs dating during 1512–18. In 1525 it was used on a votive medal. The oldest known example of the (chessboard in Croatian) in Croatia is to be found on the wings of four falcons on a baptismal font donated by king Peter Krešimir IV of Croatia (1058–1074) to the Archbishop of Split.