The House of Della Torre (Torriani or Thurn) was an Italian noble family of Swiss descent who dominated Lombardy and much of northern Italy between the 12th and 14th centuries.

An ancient family of the Milanese aristocracy from Milano Porta Nuova, according to the tradition of descendant line of the De La Tour di Borgogna, of whom two members moved around the year 1000 in Val Sassina to marry two daughters of Count Tacius.

The De La Tour in turn are said to be descendants of Anscario I, count of Oscheret (kingdom of Burgundy) and later marquis d'Ivrea, related to the imperial family of Charlemagne.

The Della Torre family had been enfeoffed by the archdiocese of Milan with vast territories reaching as far as the Canton Ticino, whose main body was the county of Valsassina, with the fortified village of Primaluna in the center.

[1] Made Barons zum Creutz by the Holy Roman Emperor in 1532, the Carinthian branch, called von Thurn und Valsassina, became Imperial counts in 1541,[1] acquiring Bleiburg castle in 1601, still the family seat.

In 1552 they obtained the post of hereditary marshal in the County of Gorizia, where their ancestral nobility had been recognized in the person of Valveno della Torre in 1329.

Although both of these two families had similar names and both later belonged to the German and Austrian nobility, they were not to be confused, as they are related only through the female line, and as such, were not agnatically part of one same noble House.