This is a presence/absence data set of monumental structures (e.g., marae, moai, heiau) from East Polynesia forming the dataset analysed in Cochrane 2015 (Journal of the Polynesian Society). All data colated from various published sources. First columns identify the structures by island, publication, site name, etc. Subsequent columns are presence/absence of particular architectural features. For full description see Cochrane 2015