AA Files 71 features essays on Brunelleschi, by Pier Vittorio Aureli, on the Museum Insel Hombroich, by William Firebrace, on Louis Bonnier, possibly the most boring architect in nineteenth-century France, by Andri Gerber, on the relationship between the artist Joseph Beuys, the architect Hans Hollein and the curator Johannes Cladders, by Eva Branscome, and two conversations, the first with Irish-American architect Kevin Roche, and the second with the Japanese architect Hiroshi Hara.