Cardinal <a href="https://en.wikipedia.org/wiki/Pietro_Ottoboni_(cardinal)" class="extiw" title="w:Pietro Ottoboni (cardinal)">Pietro Ottoboni</a> (1667-1740)
<br> originally ublished in <i>Osservazioni per ben regolare il coro dei cantori della capella pontificia.</i> Rom 1711, hinter S. XLIV des "Vorworts" vgl. <a rel="nofollow" class="external text" href="https://archive.org/stream/bub_gb_oSdOXnRPsjoC#page/n23/mode/2up">Scan bei Archive.org</a> oder, in besserer Qualität <a rel="nofollow" class="external text" href="https://books.google.de/books?id=6-xCAAAAcAAJ&amp;pg=PA1">Scan bei GBS</a> (beim letzten Link 3 Seiten zurückscrollen)
<div class="fn value">
Franciscus Trevisanus (Patritius Venetus) see <a rel="nofollow" class="external text" href="http://www.the-saleroom.com/en-gb/auction-catalogues/bolaffi-ambassador-auctions/catalogue-id-srbol10007/lot-fd77c78e-ed54-46ab-979d-a424015c9708">the-saleroom.com</a></div>
1711<div style="display: none;">date QS:P571,+1711-00-00T00:00:00Z/9</div>
scan from: Ralph Kirkpatrick: Domenico Sarlatti. Princeton University Press, Princeton, New Jersey 1953