# Portret van Martha Cornelia Blok

- By: London and Continental Photographic Copying Company
- Date: 1850 - 1867
- Medium: cardboard, photographic support
- Classification: carte-de-visite
- Dimensions: height 106 mm x width 64 mm
- Credit line: Gift of A.J. Jürgens, Amsterdam
- Museum: [Rijksmuseum](https://www.rijksmuseum.nl/en/collection/object/RP-F-2001-17-9--cf804bead0cc3801574f759eb4c3522e)
- Rights: [Public Domain Mark](http://creativecommons.org/publicdomain/mark/1.0/)
- Picture: https://invisiblenetwork.ai/thumbs/web/b160d618d9245cc6225565332808c314.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)