"The Jews have a handsome Synagogue in this City [Leghorn/Livorno]. The King of Denmark being there in the Year 1709, would not go to any of the Roman Catholick Churches, but went to the Synagogue, as they say; of which they keep a Memorial in an Inscription on the Stair-case which goes up to it."
Edward Wright (Esq.). Some observations made in travelling: through France, Italy, &c. 1730. Page 373