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First Masses by Religious Order — Map
Same locations as the homepage map, color-coded by the religious order (or diocesan clergy) that said each Mass, where known
First Masses by Longitude and Year
Each dot is one first Mass — its year against how far west it lies. Color follows religious order, as in the map above; hollow dots are disputed or inferred. Click a dot to open its entry.
First Masses by Decade
First recorded Masses across the dataset, grouped by decade
First Masses by State
Every state and territory currently represented, ranked by number of first Masses
First Masses by Religious Order
Where a specific order is known — most don't record one yet
Data Completeness
Share of first Masses with each optional field filled in