Monatarenti stands in a strategical position on the 'Montagnola Senese'. From Siena the castle can be reached following the SS73. About 1 km passed the village of Rosia, just before the crossroad with the SS541 for Colle Val d'Elsa, on your right you will find the indication for Montarrenti.
archaeological excavations have dated the origin of Montarrenti between
the second half of the 7th and the first half of the 8th century
as a village of huts encircled by two timber palissades to defend
one the lower and the second one the higher part of the relief. The
hamlet become then, in Carolingian age, a storage center for
the agricultural products of the area. Between
the 8th and
the 9th century the palissade at the top of the hill was replaced by
a stone wall.
Documents of the years 1200-1216, let us suppose the existence of strong family ties between the powerful Lords of Frosini (a nearby castle), descending from Della Gherardesca Counts, and the Lombards nobles residing in Montarrenti and connected with the Aldobrandeschi family.
the beginning of 13th century, Siena expanded
its dominion on great part of southern Tuscany and on 5th
September 1217 the nobles and three consuls of Montarrenti
sworn fidelity to Sienese Republic.
From this moment on Siena sent at the castle, every six
months, its Podesta.
In 1271 the administartive unit of Montarrenti was
closed, due to the great demographic decrease.
This confirms that the castle-planning reached its height between
the end of 12th and the first half of
the year 1317 the notices about the castle are few
and related only to ownership changes. In some documents
1720 we learn that Montarrenti
was already in ruins:
the walls of the village's houses were collapsed, the two main towers
were occupied by the last inhabitants but in the Church of Santa
the Holy Mass was no more officiated.