A highlight is the cathedral St-Pierre in the Vielle Ville whose elegant shape and spare, distinctly ungilded interior demonstrates the city's Calvinist heritage. That is not to say though that it is not striking and beautiful - the interior's grey stone is bare but shining and the columns have the merest hint of carving at the base and top. All of this means that the stained-glass windows stand out all the more, both the rose windows and the blue-turquoise over the altar, reminiscent of Chagall. Unusually, rather than depicting parables or saints, most (except those in the apse) are either geometric in design or portray natural images like flowers and trees.
The pulpit is quite fine but most impressive are the 11 carved choir-stalls (with duck-billed crowned dragons on either end) with their beautifully ornate images of 5 prophets, 5 apostles and the church's patron.
Upstairs, the 157 steps of the north tower (CHF 3) are rather worn but the panoramic view is worth the climb - be warned : it gets quite busy and the up and down directions are both conducted on the same staircase.
I found the crypt, containing an archaeological museum (closed Mondays) with a partly uncovered mosaic floor (CHF 5), less impressive and not really worth the time or entrance fee.