The Cathedral of Ratzeburg, one of the oldest brick churches of Northern Germany, is a basilica with three naves. Its arches are supported by pillars and it is built in the form of a cross with a choir quadrangle and a halfround apse. The last restoration (completed in 1966) returned the cathedral to its late Romanesque conception, so you can discover most of the unity and integrity of its original design.
The cathedral was founded in 1154, when Henry the Lion, Duke of Saxony, and Hartwich I, Archbishop of Hamburg, refounded the episcopal seat of Ratzeburg, and Evermodus became its first bishop. The cathedral was restored, and additions were made to it in the 15th century.
The Cloister, on the north side of the Cathedral, was begun shortly after the completion of the Cathedral (ca. 1220). The cloistered courtyard is open for the public.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.