Letter from the Editor -- Letter from the Editor -- Recalling Eero Saarinen 1910–2010 -- How the Gateway Arch Got its Shape -- Saarinen’s Shell Game: Tensions, Structures, and Sounds at MIT -- The Next Largest Thing: The Spatial Dimensions of Liturgy in Eliel and Eero Saarinen’s Christ Church Lutheran, Minneapolis -- Morphocontinuity in the work of Eero Saarinen -- Eero Saarinen, Eduardo Catalano and the Influence of Matthew Nowicki: A Challenge to Form and Function -- Eero Saarinen’s North Christian Church in Columbus, Indiana -- Other Research -- On the Modular Design of Mughal Riverfront Funerary Gardens -- Discontinuous Double-shell Domes through Islamic eras in the Middle East and Central Asia: History, Morphology, Typologies, Geometry, and Construction -- At the Other End of the Sun’s Path: A New Interpretation of Machu Picchu -- The Body, the Temple and the Newtonian Man Conundrum -- Book Review -- The Symbol at Your Door: Number and Geometry in Religious Architecture of the Greek and Latin Middle Ages -- Conference Report -- Architecture and Mathematics. A seminar to celebrate Professor emeritus Staale Sinding-Larsen’s 80th birthday -- Erratum -- Erratum to: The Sunlight Effect of the Kukulcán Pyramid or The History of a Line.