Olaus Magnus - On the Signification of Thunderstorms for Every Specific Month
Summary
The round ribbon in the middle symbolizes the year. We recognize the months (A = April, M = May, I = June etc.). The winter months give much snow and a little of thunderstorms. The summer months give rain and much thunder. At bottom two wise men with rune staffs.
Date
1555
Source
"Historia de gentibus septentrionalibus", book 1 - retrieved from Lars Henriksson's clipart collection, descriptions used with permission.
Copyright info
public domain