Based in South East London, Diagonal Furniture specializes in post-war design pieces from Holland, Germany, Denmark and the UK, with a strong focus on architectural modernism. Diagonal Furniture is the creation of Mario Siebert, who began collecting designer furniture while living in Berlin and working in a local vintage furniture store. It was there that he learnt about European post-war design and started to build a collection of his own. Frequent trips to Holland sparked a passion for Dutch art, graphic and industrial design, which have become favourites of Mario. Diagonal Furniture launched in early 2014, and is a culmination of Mario's passion for the business and his insider knowledge.