 St. Francis de Sales church
...that the dome of St. Francis de Sales church in Philadelphia is a prime example of the Guastavino tile arch system?
...that the dome of <b id="mwCME"><a href="./St._Francis_de_Sales_Roman_Catholic_Church_(Philadelphia)" id="mwCMI" rel="mw:WikiLink" title="St. Francis de Sales Roman Catholic Church (Philadelphia)"> St. Francis de Sales church</a></b> in Philadelphia is a prime example of the <a href="./Guastavino_tile" id="mwCMM" rel="mw:WikiLink" title="Guastavino tile">Guastavino tile arch system</a>?