The Castle of Serravalle (, ) is a medieval castle in Bosa, province of Oristano, Sardinia, Italy.
History It's named after the hill, overlooking the town of Bosa, on which it was built by the ancient Tuscany Malaspina family in the 13th century. It is on top of the hill of Serravalle, and it can be reached by a long, steep staircase. The first nucleus of the Serravalle Castle was built on the homonymous hill: the date of its construction, traditionally fixed in 1121 by the humanist and historian Giovanni Francesco Fara«Veteri ac destructa urbe fuit a Marchionibus Malaspinae anno circiter 1121, nova constructa Bosa, mari vicinior, ad fluvii dexteram oram, et montis radicem, qua meridiem spectat, moeniisque cincta». Giovanni Francesco Fara, De chorographia Sardiniae, I, Cagliari, Monteverde, 1838 [1580-1585], p. 89 is to be postponed, with the contribution of the excavations conducted by the archaeologist Marco Milanese, around the second half of 13th centuryMarco Milanese, Conflict Archeology. Archeologia delle frontieree delle fortificazioni d'Età Moderna, in APM - Archeologia Postmedievale, vol. 13, Firenze, All'Insegna del Giglio, 2012, p. 163.
In the vast Place-of-arms is located the small church of Our Lady de Sos Regnos Altos, the palatine chapel of the castle. In the interior of the sanctuary there are series of frescoes dating from the 14th century.
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