Erected in 1824 by Pietro Nobile according to plans designed by Luigi Cagnola, and inaugurated by Emperor Francis I of Austria in the honour of the veterans of the Napoleonic Wars, it was rebuilt as a war memorial in 1933/34 and houses a Tomb of the Unknown Soldier.
From 1682 to 1691, Count Philipp Emmerich turned the decayed ruins into a Baroque castle; from 1821 to 1836, the Austrian Chancellor Klemens Wenzel von Metternich remodeled it in the imperial style with the help of architect Pietro Nobile.
Pietro Mascagni | Pietro Bembo | Pietro da Cortona | Ponte San Pietro | The Battle of San Pietro | Pietro Tacca | Pietro Perugino | Pietro Canonica | Pietro Annigoni | San Pietro in Casale | Pietro Tenerani | Pietro Tagliavia | Pietro Frua | Pietro Consagra | Umberto Nobile | San Pietro in Ciel d'Oro | Pietro Verri | Pietro Scalia | Pietro Lombardi | Pietro Gori | Pietro Delitala | Pietro de' Crescenzi | Pietro Badoglio | Pietro Paolo Cristofari | Pietro Nobile | Pietro Musumeci | Pietro IV Candiano | Pietro Garinei | Pietro Della Valle | Pietro Cascella |
This was continued in 1816 by the Ticinese architect Pietro Nobile, commissioned by the emperor Francis I of Austria.