The ”Sezione di Archivio di Stato” of Sondrio was introduced in 1946 (Decreto del Ministero dell’Interno 3.10.1946) and then changed into “Archivio di Stato” after the legislation of 1963 (DPR 30.09.1963, n. 1409). “Archivio di Stato” of Sondrio receives the payment, by the times decided by the current legislation, the funds of public peripheral administration offices which are pertinent on territory base (provincial), notary’s documents whose activity is concluded over hundred years, the archives not state received by purchase, donation, deposit.


From XIV century Valtellina was part of the Duchy of Milan. The nearby Swiss occupied it in 1512 and with the Teglio’s oath (27 giugno 1512), the territory became officially part of the grisons’ lands and divided in three farmlands guided by the Valley’s captain who lived in Sondrio and by two podestas. The territories of Chiavenna and Bormio, traditionally independent, were ruled apart. During the Grison’s domination there were violent fights between catholics and protestants which ended in the over 600 valtellinese protestants killing on the one night between the 18 and 19 july 1620. The conspiracy, known as Sacro Macello of Valtellina, was guided by Gian Giacomo Robustelli from Grosotto, financied by the Spanish governor of Milan. In 1797 Valtellina was united in Repubblica Cisalpina (Department of Adda and Oglio, by 1801 department of Lario) and from that moment followed the events of Lombardia since it was part of the Italian Republic (1802-1805) and, then, of the Italian Reign (department of Adda). After the Napoleone’s defeat the Swiss tried to regain Valtellina and Valchiavenna, but they retreated without fighting because the territory had been occupied by the Austrians. After the Vienna’s Congress the valley became part of the Lombardo Veneto reign (province of Valtellina); in 1859 of the Sardinian reign and in 1861 of the Italian reign (province of Sondrio).


The “Archivio di Stato” of Sondrio at the moment of its introduction was collocated in a building situated along the left embankment of the river Mallero. The building had been projected in 1883 by the engineer Giovanni Battista Bosatta to host the council and the provincial deputation. The Mallero flooding of 1927 ruined the building. The palace was rebuilt and in 1935 hosted the notarial archive and then the “Archivio di Stato” from 1946.

In 2005 the offices and the study hall were moved to the third floor of the adjacent the “palazzo Martinengo”, property of the city of Sondrio, built in the XVI century for Ulisse Martinengo’s will, noble of Brescia escaped to Valtellina.

In the years from 2008 to 2013, because of the restructuring works, the palace along Mallero was entirely emptied and the documents were moved in outsourcing in a deposit of the Novara province. In 2014 all the material was brought back to the headquarter, tidied, inventoried and put on the shelf.


Conditions and requirements for the access:

Free access for the adults

To use the institute’s services the users must fill out the access request on the appropriate form.

The access to the documents is free, but according to the current normative the consultation of the last seventy years documents which contains sensitive information must be allowed by the “Ministero dell’Interno”.

The researchers are obliged to respect the internal regulation and the ethical code and good behaviour for the treatment of the personal data for historical purpose. (G. U. n. 80 of 5 April 2001).


Study hall, service of photoreproduction and administrative offices are on the third floor of the “Palazzo Martinengo”; the access for the people with disabilities is allowed by elevator from the ground floor.

On request to the director of the institute through mail, fax or e-mail one can do free research for correspondence.


Monday - Friday: from 8.00 to 13.30
Tuesday - Thursday: from 8.00 to 17.00
Wednesday: from 8.00 to 15.00

Closed on Saturday and on 19 june (patron saint celebration)