The theme for March was anniversaries and celebrations. There are plenty of modern commemoratives to collect but when did they start? the Romans marked anniversary games and announced political and military successes. In modern times commemoratives usually referred to royal events.
This is an image of a personal medallion from Sweden commemorating the life of Christina Specht 1792 to 1721 daughter of merchant Gert Specht and married to naval pharmacist Johan Julius Salberg 40 mm silvered white metal. I bought it for about £5 about 15 years ago. I only identified it last week, a day before our meeting. I had thought it German but with a google search I came across a copy in copper and got the inscription translated with a friend's help.