Alexandros Tombazis may have entered his eighth decade but, as we showed in our September issue, the Greek architect and eco-pioneer shows no signs of slowing down. He heads a 60-strong office in Athens and leads about 20 realised and conceptual projects per year. With more than 800 projects under his belt - about 300 of them built - and at least 110 prizes gained in competitions, he is one of Greece's most prominent and successful living architects. Less known about Tombazis, however, are his skills as an artist. As he travels the globe, he is continually sketching, painting and taking photographs. Here he shows us a series of his energetic architectural drawings.