in the centre of Sofia, Bulgaria, within 2 minutes walk of each other are a bulgarian orthodox cathederal, a mosque, and around the corner, a synagogue

this is very common everywhere there isn't a radical islamist government

in sarajevo also the main serbian orthodox church and main mosque are within 5 minutes walk of each other, indeed, although a bit uncommon nearby also ashkenazi jewish synagogue near the main old town of sarajevo... in sarajevo though, there is practically a mosque for every suburb where the churches are not so common