Sant'Andrea delle Fratte, designed by several architects, among whom there is Borromini who realised the wonderful bell tower, is a church close by Spanish steps. Inside this church there are two angels done by Bernini and initially destined to Ponte Sant'Angelo. They have been put here to protect them against the bad weather. The church is popular also for another reason: it has what is called by the romans the "dancing bell tower". Every time the bells ring, the bell tower swing visibly. For this reason the romans nicknamed it as "dancing bell tower"!
