Brondesbury Park Synagogue members shared details of Jewish life in an exchange programme with Muslims from a neighbouring mosque.
The shul-goers were told how the Imam Khoei Centre in north-west London had been converted into a mosque in the 1980s after being used for synagogue services a decade earlier.
A Muslim calligrapher wrote the Jewish visitors' names in traditional Islamic styles during the session, which was followed by members of the Al Khoei community making a reciprocal visit to the shul.
Rabbi Baruch Levin said: "Events of this kind are hugely important as they break down perceived barriers between faith communities at a local level, thereby enriching the sense of social cohesion and highlighting the range of common interests we share."