This is the fossil stem of a giant horsetail plant: *Calamites*. This fossil is Late Triassic in age (237 - 201 million years ago) and is from Zeil in Bavaria, Germany. This object is part of the historical ‘Ettingshausen collection’, which is on permanent loan from the Institute of Biology, University of Graz. It is not currently on display. **Specimen**: Large, sand cast of a fossil horsetail stem **Inventory number**: NHMW-GEO-2024/0188/11189 **Collection**: NHMW, Geology & Palaeontology Dept., Palaeobotany (curator: Chris Mays) **Origin**: Zeil am Main, Franconia, Bavaria, Germany Find out more about the NHM Vienna [here](http://nhm.at/en). Scanned & edited by A.Haider (NHMW) Scanner: Artec Space Spider Contribution to the digitization project „Einsichten in die gesellschaftspolitische Dimension des NHMW über die Jahrhunderte von der Prägung des Wissenschafts-Verständnisses bis zum Nationalpark in der Lobau“ funded by the [BMWKMS](https://www.bmwkms.gv.at/).