A visiting card is a small paper card with a person's name on it. They were used to let someone know that another person had come to their home for a visit. Some visiting cards had just a name on them. Some also had images.
Visiting cards are not used as much as they used to be. Business cards are now used the way visiting cards used to be used.
A plain visiting card with only a name (Johann Wolfgang von Goethe)
The visiting card of Johann van Beethoven, brother of Ludwig van Beethoven
Visiting card of Wilhelm II of Germany