5 ranging from the prehistory to the recent times. In combination with the monitoring of the site using detailed topographical measuring, drone recordings, augerings, etc., the project provides not only important information on the archaeological built up of this site, but also the impact of climate change en resulting riverine erosion. Foremost the project demonstrates the value of the collaboration between heritage professionals and amateur archaeologists. Kristin Oswald (Universität Hamburg), SocialMediaHistory. Bridging Citizen Science, Public Archaeology and Social Media Research Professionals in the field of public archaeology and heritage practices need at least a basic understanding of the public's knowledge and perceptions of archaeology. This is possible through research on social media, where archaeology related content is by no means always published by researchers themselves. Over the last three years, the German citizen science project "SocialMediaHistory" has explored the dynamics of past-related content on Instagram and TikTok. The participating citizens helped specify and conduct the research but also broadened the project's perspectives, focusing not only on content, but also on the various functions and forms of usage of the platforms. As an archaeologist and project coordinator, it was particularly important to me to consider archaeological topics as part of our research. During the conference I would like to give a brief introduction to the project and exemplary highlight our findings about German-language content tagged with #Germanen and #CitizenScience. Furthermore, I would like to outline general approaches for collaborative research on social media content related to (hobby) archaeology. Rikke Søgaard (University of Copenhagen), Sustainable metal detecting: to register, or not to register, that is the question Since around the turn of the millennium, new archaeological sites found in Denmark have primarily been discovered due to metal detecting – and by extension, ten thousand findings are coming to light each year. This presentation, part of a master's thesis, explores the delicate balance between the depth of registration and the limitations of time and resources in the context of metal detector findings in Denmark. Focusing on the motivations of metal-detecting users and existing registration systems and practices in Denmark raises the question: How much should we register? Can we register too much? How can we optimize registration processes considering finite resources and time? Drawing on a case study of lead spindle whorls from Southern Jutland, featuring local designs alongside imported counterparts, this presentation aims to raise questions within the broader framework of heritage management and stimulate discussions on effective and sustainable approaches to recording metal detector finds. Mathias Kaas (Aarhus University), Brooches and Beyond My master’s thesis, scheduled for submission on 03/06/2024, is centered on constructing a typology for Nordic equal-armed brooches dating to the Viking Age, exclusively utilising data from online databases. It investigates the representativeness of this data and discusses the opportunities and
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