Bishop's Castle, Glasgow

The Bishop's Castle, also known as Glasgow Castle, was a medieval castle in Glasgow, Scotland. It served as the residence of the bishops and archbishops of Glasgow Cathedral until the Reformation, when the last Catholic archbishop, James Beaton, fled to France in about 1560. The castle was completely destroyed in the late 18th century, to make way for the Glasgow Royal Infirmary.

The origins of the castle are unclear, but the first development was probably in the 12th century. It was recorded as a royal fortress in the mid 13th century. It had become an episcopal residence by the time of the Wars of Scottish Independence, when William Wallace recaptured the castle from the English in 1296. In 1301 the castle was garrisoned again by Edward I.

In the 15th century a 5-storey keep was built by Bishop Cameron, this was later extended with additional fortifications and buildings, constructed by later bishops. Archbishop Beaton added a large corner tower, and Archbishop Dunbar built a round-towered gatehouse in 1544. The central keep served as the residence of the bishop, and was called the Bishop's Palace. The castle played a role in the many political battles during the 16th century, including the protracted struggle between supporters of Mary, Queen of Scots, and her enemies. It changed hands six times between 1513 and 1570, and was occupied by French troops at one point. In 1544 it was defended against Regent Arran and in 1560 defended for Arran.

The castle fell into disrepair during the 17th century, despite an attempt at repair by Archbishop Ross in the 1680s, and was gradually dismantled for its stone. It was finally demolished completely in 1789, to make way for the construction of the Glasgow Royal Infirmary. Foundations of the castle were discovered during excavations for the St Mungo Museum of Religious Life and Art in the 1980s. The base of the corner tower and curtain walls were uncovered

A stone from the castle, with a modern plaque, is located in Cathedral Square, marking the location of the keep.