The Eastern Orthodox Keras Kardiotissas is dedicated to Virgin Mary that is situated near the village of Kera of the Heraklion regional unit in Crete. It is built on the north slopes of Mt. Dikti, at an altitude of 650 m and a location that is approximately 50 km east of Heraklion, next to the road to Lasithi Plateau.
The exact date of the monastery's establishment is unknown. However, references to it are made in manuscripts dating from the early fourteenth century. The monastery was named after an old icon of Theotokos that according to tradition was miraculous. That icon was stolen in 1498 by a wine merchant and transferred to Rome where it is now permanently enshrined in the Church of St. Alphonsus near the Esquiline Hill. The stolen icon was replaced by another one in 1735 that is also regarded as miraculous. During the Ottoman occupation of Crete, the monastery often served as a local revolutionary center and suffered several retaliatory attacks as a result. In 1720, Kera monastery became Stauropegic (independent of the local Bishop).
The monastery is surrounded by fortified walls. The main church (katholikon) was originally built as an arch-covered single space structure and was later expanded with two narthexes and a smaller chapel. The church features murals dating to the 14th and 15th centuries.
Today, the monastery functions as a nunnery. It celebrates the birth of Mary on September 8th every year.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.