The first Castle , called palatium , was built in 11th century , the remains of it are still visible inside the walls .
The first Castle , called palatium , was built in the 11th century , and the remains of it are still visible inside the walls .
The first Castle , called palatium , was built in the 11th century , and the remains of it are still visible inside the walls .
Remove grammar mistakes: The first Castle , called palatium , was built in 11th century , the remains of it are still visible inside the walls . Output: