Came across this book, and he makes some interesting claims... For example that in 1676 a synagogue was built in St Pierre, Martinique. I do know that a Sefer Tora came from Amsterdam to Martinique in 1676, but have never seen any evidence of an actual -purpose built- synagogue. He also says that in Guadeloupe a synagogue was built in the same year (!), even though I can't find any record of it somewhere else.