The El Ghriba Synagogue in Tunisia

THAT'S THE SPIRIT! Hundreds of Jews Make Pilgrimage to Ancient Tunisian Synagogue, Despite Terror Threats.

(JNS.org) Hundreds of Jews are making a pilgrimage to the ancient Tunisian synagogue of El Ghriba on the island of Djerba, despite warnings of a possible terror attack against Jewish targets.

“There is a lot of security, there are soldiers and police everywhere and that is very reassuring to us,” French-Jewish tourist Lorine Bendayan told AFP.

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I can't find any clear information on exactly how old this synagogue is, but people seem to think it was founded in antiquity. The current structure dates to the nineteenth century.

Background on the situation in Tunisia is here and links.