Peripleo is a prototype application for the discovery and spatial visualisation of collection data, originally an initiative of the Pelagios Network and developed early in 2022 as part of the British Library's Locating a National Collection project (LaNC). LaNC was a Foundation project within the AHRC-funded Towards a National Collection Programme. The main development code (https://github.com/britishlibrary/peripleo-lanc) can be found here alongside the template for producing your own version (https://github.com/britishlibrary/peripleo). The development code contains several of the project’s linked datasets structured in a variant of the Linked Places standard.