Before you leave the piazza, go and find the fountain. It carries an inscription that is very much in the spirit of the man who built this church: Ama Dio e non fallire, fa del bene e lassa dire, which means love God and do not fail, do good deeds and let others talk. The date carved with it is one thousand six hundred twenty-two. Turismo Roma describes this fountain as among the most unusual and little-known in the city, so it is worth a slow look. The church is more than a monument, too. In 1905 the nearby parish church of San Tommaso in Parione was judged too small for its congregation, and the Chiesa Nuova was made the parish church instead, still served by the Oratorians. In 1922 the convent became home to the Archivio Storico Capitolino, the city's historical archives, and it also houses the Vallicelliana Library, established by Philip in 1581 and described as the oldest public library in Rome, along with the Roman Newspaper Archives, which hold copies of almost every newspaper published in Rome since the eighteenth century. So as you step back out, listen to the ordinary sounds of the street and think about layers: an underworld spring, a weeping painting, a saint who wanted plain walls, and rooms full of centuries of paper. Which layer would you like to open first?