30 Euston Square | 1,331 followers on LinkedIn. Grade II* listed award winning events venue conference, meeting and events venue in the heart of London | 30 Euston Square is a Grade II* listed award winning events venue, in a perfect central London location. Following a significant investment and refurbishment programme, we opened our doors as an event venue in February 2013. Our unique building integrates grand Edwardian façade and original Greek Revival architecture with modern detailing and contemporary characteristics.