Supporting Information S1: Lines of codes for the Bayesian models Model A Sequence("Lefkandi, Kalapodi, Corinth") { Boundary("Start LH IIIC E-M"); Phase("LH IIIC E-M") { R_Date("RTK6370L", 2880, 55); }; Boundary("Transition LH IIIC E-M/LH IIIC M-L"); Phase("LH IIIC M-L") { R_Date("RTK6372-73K", 2930, 25); R_Date("RTK6374-75K", 2911, 17); }; Boundary("Transition LH IIIC M-L/LH IIIC L-SM"); Phase("LH IIIC L-SM") { R_Date("RTK6123L", 2975, 30); R_Date("RTK6127L", 2920, 30); R_Date("RTK6156L", 2855, 50); R_Date("RTK6124L", 2850, 30); R_Date("RTK-6699C", 2805, 55); }; Boundary("Transition LH IIIC L-SM/PG"); Phase("PG") { Sequence() { R_Date("RTK6371K", 2850, 40); R_Date("RTK6384L", 2880, 40); R_Date("RTK6397K", 2742, 29) { }; R_Date("RTK6396K", 2888, 28); }; R_Date("RTK-6697C", 2835, 55); }; Boundary("Transition PG/G"); Sequence("G") { R_Date("RTK-6701C", 2760, 60); R_Date("RTK-6702C", 2855, 55); }; Boundary("End G"); }; Model B Sequence("Lefkandi, Kalapodi, Corinth") { Boundary("Start LH IIIC E-M"); Phase("LH IIIC E-M") { R_Date("RTK6370L", 2880, 55); }; Boundary("Transition LH IIIC E-M/LH IIIC M-L"); Phase("LH IIIC M-L") { R_Date("RTK6123L", 2975, 30); R_Date("RTK6372-73K", 2930, 25); R_Date("RTK6127L", 2920, 30); R_Date("RTK6374-75K", 2911, 17); }; Boundary("Transition LH III M-L/LH IIIC L-SM"); Phase("LH IIIC L-SM") { R_Date("RTK6156L", 2855, 50); R_Date("RTK6124L", 2850, 30); R_Date("RTK-6699C", 2805, 55); }; Boundary("Transition LH IIIC L-SM/PG"); Phase("PG") { Sequence("PG") { R_Date("RTK6371K", 2850, 40); R_Date("RTK6384L", 2880, 40); R_Date("RTK6397K", 2742, 29) { Outlier(); }; R_Date("RTK6396K", 2888, 28) { Outlier(); }; }; R_Date("RTK-6697C", 2835, 55); }; Boundary("Transition PG/G"); Phase("G") { R_Date("RTK-6702C", 2855, 55) { }; R_Date("RTK-6701C", 2760, 60); }; Boundary("End G"); }; Model C Sequence("Lefkandi, Kalapodi, Corinth") { Boundary("Start LH IIIC E-M"); Phase("LH IIIC E-M") { R_Date("RTK6370L", 2880, 20); }; Boundary("Transition LH IIIC E-M/LH IIIC M-L"); Phase("LH IIIC M-L") { R_Date("RTK6123L", 2975, 20); R_Date("RTK6372-73K", 2930, 20); R_Date("RTK6127L", 2920, 20); R_Date("RTK6374-75K", 2911, 17); }; Boundary("Transition LH III M-L/LH IIIC L-SM"); Phase("LH IIIC L-SM") { R_Date("RTK6156L", 2855, 20); R_Date("RTK6124L", 2850, 20); R_Date("RTK-6699C", 2805, 20); }; Boundary("Transition LH IIIC L-SM/PG"); Sequence("PG") { R_Date("RTK6371K", 2850, 20); Phase("MPG and LPG") { R_Date("RTK6396K", 2888, 28) { Outlier(); }; R_Date("RTK6384L", 2880, 20); R_Date("RTK-6697C", 2835, 20); R_Date("RTK6397K", 2742, 29) { Outlier(); }; }; }; Boundary("Transition PG/G"); Phase("G") { R_Date("RTK-6702C", 2855, 20) { }; R_Date("RTK-6701C", 2760, 20); }; Boundary("End G"); }; Model D Sequence("Lefkandi") { Boundary("Start LH IIIC L-SM"); Phase("LH IIIC L-SM") { R_Date("RTK6156L", 2855, 50); R_Date("RTK6124L", 2850, 30); }; Boundary("Transition LH IIIC L-SM/PG"); Phase("PG") { R_Date("RTK6384L", 2880, 40); }; Boundary("End PG"); };