Joshua is an enthusiastic and experienced art historian and lecturer who thoroughly enjoys sharing his love and knowledge of fine art, photography and design with an audience. He is an experienced lecturer in 19th and 20th century European and American art, international contemporary art, photography, design and architecture. At Christie's, Joshua was director of The London Art Course and other courses in the field of modern and contemporary art, ranging from Impressionism and Surrealism to photography and modern sculpture. He has lectured for Sotheby’s Institute, The University of the Arts, The University of California, Cheung Kong Business School (China's leading business university), Tate Modern and Tate Britain, The Victoria and Albert Museum Academy, The National Portrait Gallery, Somerset House, The Design Museum, Union Bank of Switzerland, Art History Abroad, and P & O Cruises. Drawing on his media experience as a former BBC journalist, Joshua is also a founder and presenter of The Art Channel, an online project documenting and interpreting art exhibitions and artworks in museums and commercial galleries.