The Institut de France appointed Blouet the head of the fine arts section of the French Morea expedition 1828–1833, the second of three great military-scientific expeditions led by France in the first half of the 19th century, in which geologists and antiquarians accompanied an expedition with military objectives, in this case to deport all Ottoman nationals from the Morea, a turning-point in the Greek War of Independence. In the course of the expedition he established the identity of the Temple of Zeus at Olympia (1829), which was measured and carefully drawn and published.