The University of Salamanca was founded in 1134 and given the Royal charter of foundation by King Alfonso IX in 1218. It is the oldest founded university in Spain and the third oldest university in the world in continuous operations. The formal title of 'University' was granted by King Alfonso X in 1254 and recognized by Pope Alexander IV in 1255.
Set of buildings that made up the university are situated around the square known as Patio de Escuelas. In this same square is the home of the Doctors of the Queen (15th century), whose façade is Gothic with Renaissance details and is now the Museum of Salamanca.
References:What an amazing structure. Who designed and built it?
Kakesbeck is one of the largest medieval fortifications in Münsterland and the oldest castle in Lüdinghausen. The imposingly grown complex originated in 1120 as a motte, a small hilltop tower castle. After numerous changes of ownership, the castle was extended onto two islands, but it was not until the 14th century that it underwent significant alterations and extensions under the von Oer family. The estate experienced its heyday in the middle of the 18th century, when it covered an area of almost one square kilometre and consisted of five further outer castles in addition to the core castle, which were secured by ramparts and moats.
The well-maintained condition of the castle today is thanks to the late Wilfried Grewing, the former lord of the castle. The foundation named after him has been particularly committed to preserving the property since 2020.