Heraldry deals with the art of heraldry, heraldry and heraldic law. Following in the footsteps of the House of Nassau, the Royal Dutch Genealogical-Heraldical Society visited Wiesbaden on September 16, 1937.

At a reception in the town hall, Lord Mayor Erich Mix praised the work of the society in a speech and explained the close ties between the Netherlands and the ducal residence city due to their shared history through the House of Nassau.

The visitors expressed their thanks for the warm welcome and expressed their confidence that they would be able to complete the coats of arms of the various branches of the Nassau family through their research in Wiesbaden. The heraldists then signed the city's Golden Book.