You can book Erik for lectures and articles.

His fields of expertise:

- Dutch jewellers and diamond traders and cutters 
- Royal jewels, especially those of the Dutch royal family
- Oscar Massin, the innovator of 19th century jewellery
- The symbolism of precious stones in the Divine Comedy of Dante Alighieri

Please contact me through the contact page on my site.

Overview of future and past lectures
- (upcoming) The Dutch Royal House and their Jewish Jewellers, Jewish Historical Museum, Amsterdam, 16 September 2018 
- The role of traditional Dutch dress in royal PR - Annual Members Conference of the Royal Association of Orange Societies, Bunschoten-Spakenburg, October 2015
- The origins of the Etruscan Myth in Florence, 5th Zenobia Conference: the Etruscans and the Sea, University of Amsterdam, Amsterdam, October 2011
- Trees of Gold. Royal Adaptations of Paradise in Dante's Purgatory, Forum Middeleeuwen Amsterdam, University of Amsterdam, September 2008. 
- Trees of Gold. Royal Adaptations of Pariadise in Dante's Purgatory, International Medieval Congress, Leeds, July 2008.