Cassero Senese
| Cassero Senese | |
|---|---|
| Grosseto, Tuscany, Italy | |
The keep incorporated in the Bastione Fortezza | |
| Site information | |
| Type | Keep |
| Owner | City of Grosseto |
| Open to the public | Daily |
| Condition | Well-preserved or intact |
| Location | |
| Coordinates | 42°45′42″N 11°06′59″E / 42.761756°N 11.116467°E |
| Site history | |
| Built | 1345 |
| Built by | Republic of Siena |
| Materials | Stone |
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The Cassero Senese (English: Sienese Keep) is a 14th-century fortification located in Grosseto, Tuscany, Italy.
Built by the Republic of Siena, it survived the demolition of the Sienese fortifications ordered by Cosimo I de' Medici, Grand Duke of Tuscany in 1565 and was incorporated in the Bastione Fortezza (Fortress Bastion) of the Grosseto city walls.