@cicerone imposter,
I remember the Basilica di Santa Maria sopra Minerva in Rome as "blueish".
Also, speaking of arches...
wiki -
While many other medieval churches in Rome have been given Baroque makeovers that cover Gothic structures, the Minerva is the only extant example of original Gothic church building in Rome.[2] Behind a restrained Renaissance style façade[3] the Gothic interior features arched vaulting that was painted blue with gilded stars and trimmed with brilliant red ribbing in a 19th-century Neo-Gothic restoration.
Among several important works of art in the church are Michelangelo's statue Cristo della Minerva (1521) and the late 15th-century (1488–1493) cycle of frescos in the Carafa Chapel by Filippino Lippi. The basilica also houses many funerary monuments including the tombs of Doctor of the Church Saint Catherine of Siena (1347-1380), who was a member of the Third Order of Saint Dominic, and the Dominican friar Blessed John of Fiesole (Fra Giovanni da Fiesole, born Guido di Piero) better known as Fra Angelico (c. 1395-1455).
I liked it. Walked into it another time when mass, quite crowded, was going on, organ sounding beautiful. I left, wrong time to be looking around, but it was nice to hear.
Here's the outside, which I like too, even with the big difference re the gothic interior.
I'm keen on Bernini's elefante -
note: the church was built over the ruins of the temple of Isis..