This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help.
English: Population pyramid of the municipality of Zwollerkerspel from 31 december 1879
Date
Source
Own work. Data is from Volkstelling 1879. Deel Overijssel OV - Vijfde gedeelte: indeeling der werkelijke bevolking naar de kerkgenootschappen.
Author
Grwen
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
You are free:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.