Ter Apel Monastery is the only monastery in the larger area of Friesland and Groningen that survived the Reformation in a decent condition, and the only remaining rural monastery from the Middle Ages in the Netherlands. The convent buildings house a museum for monastery and church history and for religious art, as well as two contemporary art galleries. The former lay church of the monastery still functions as a reformed church.
In 1464, Jacobus Wiltingh, pastor of Garrelsweer and vicar in Loppersum, bequeathed Apell, a settlement among his possessions in the area called Westerwolde, to the Order of the Holy Cross on the condition that a monastery be built there, on the remains of a 13th-century Premonstratensian monastery. The construction, between 1465 and 1561, followed the medieval plan and included the convent building, a gatehouse, water mills, a parchment facility, a bakery, a brewery, and a guesthouse.
The monastery was bequeathed a number of gifts, including a stained glass window in 1561 by Lieutenant Johan de Mepsche and his wife Agnes, depicting Moses and the tablets containing the Ten Commandments. It also derived income from other sources. The grounds surrounding the monastery were rich in loam, which was used in construction.
When the area was conquered in 1593 by William Louis, Count of Nassau-Dillenburg, Catholicism was renounced and the convent, with the entire Westerwolde area, become the property of the city of Groningen; the monastery was saved, unlike hundreds of others in the Netherlands, because the abbot converted to Protestantism.
Storms, fire, and high maintenance costs caused major problems in the centuries after 1600. The monastery underwent many changes until 1930. The west facade was demolished sometime after 1755, and so were the upper floor with the brothers' cells (1834) and the dilapidated vaults in the church (1837). Unlike all the other monasteries in Groningen, a large part of the original buildings remained.
Between 1930 and 1933, on the initiative of the city of Groningen, the remaining buildings were carefully preserved and restored, under the direction of city engineer De Vos Nederveen Cappel. On the ground floor, three of the original four wings were retained: the church for secular canons and lay people in the south wing; the chapter house and sacristy in the east wing; and the refectory (now a cafe), the vaulted supplies cellar, the sub-prior and prior's chambers, and the guest accommodations in the north wing. These wings are connected by an ambulatory, surrounding the cloister. The original medieval cloister garden has been replaced with a herb garden; the location of this garden is the only remaining detail in the Netherlands of such a medieval garden.References:
The Porta Nigra (Latin for black gate) is the largest Roman city gate north of the Alps. It is designated as part of the Roman Monuments, Cathedral of St. Peter and Church of Our Lady in Trier UNESCO World Heritage Site. The name Porta Nigra originated in the Middle Ages due to the darkened colour of its stone; the original Roman name has not been preserved. Locals commonly refer to the Porta Nigra simply as Porta.
The Porta Nigra was built in grey sandstone between 186 and 200 AD. The original gate consisted of two four-storied towers, projecting as near semicircles on the outer side. A narrow courtyard separated the two gate openings on either side. For unknown reasons, however, the construction of the gate remained unfinished. For example, the stones at the northern (outer) side of the gate were never abraded, and the protruding stones would have made it impossible to install movable gates. Nonetheless, the gate was used for several centuries until the end of the Roman era in Trier.
In Roman times, the Porta Nigra was part of a system of four city gates, one of which stood at each side of the roughly rectangular Roman city. The Porta Nigra guarded the northern entry to the Roman city, while the Porta Alba (White Gate) was built in the east, the Porta Media (Middle Gate) in the south, and the Porta Inclyta (Famous Gate) in the west, next to the Roman bridge across the Moselle. The gates stood at the ends of the two main streets of the Roman Trier, one of which led north-south and the other east-west. Of these gates, only the Porta Nigra still exists today.
In the early Middle Ages the Roman city gates were no longer used for their original function and their stones were taken and reused for other buildings. Also iron and lead braces were broken out of the walls of the Porta Nigra for reuse. Traces of this destruction are still clearly visible on the north side of the gate.
After 1028, the Greek monk Simeon lived as a hermit in the ruins of the Porta Nigra. After his death (1035) and sanctification, the Simeonstift monastery was built next to the Porta Nigra to honor him. Saving it from further destruction, the Porta Nigra was transformed into a church: The inner court of the gate was roofed and intermediate ceilings were inserted. The two middle storeys of the former gate were converted into church naves: the upper storey being for the monks and the lower storey for the general public. The ground floor with the large gates was sealed, and a large outside staircase was constructed alongside the south side (the town side) of the gate, up to the lower storey of the church. A small staircase led further up to the upper storey. The church rooms were accessible through former windows of the western tower of the Porta Nigra that were enlarged to become entrance doors (still visible today). The top floor of the western tower was used as church tower, the eastern tower was leveled, and an apse added at its east side. An additional gate - the much smaller Simeon Gate - was built adjacent to the East side of the Porta Nigra and served as a city gate in medieval times.
In 1802 Napoleon Bonaparte dissolved the church in the Porta Nigra and the monastery beside it, along with the vast majority of Trier"s numerous churches and monasteries. On his visit to Trier in 1804, Napoleon ordered that the Porta Nigra be converted back to its Roman form. Only the apse was kept; but the eastern tower was not rebuilt to its original height. Local legend has it that Napoleon originally wanted to completely tear down the church, but locals convinced him that the church had actually been a Gaulish festival hall before being turned into a church. Another version of the story is that they told him about its Roman origins, persuading him to convert the gate back to its original form.
In 1986 the Porta Nigra was designated a World Heritage Site, along with other Roman monuments in Trier and its surroundings. The modern appearance of the Porta Nigra goes back almost unchanged to the reconstruction ordered by Napoleon. At the south side of the Porta Nigra, remains of Roman columns line the last 100 m of the street leading to the gate. Positioned where they had stood in Roman times, they give a slight impression of the aspect of the original Roman street that was lined with colonnades. The Porta Nigra, including the upper floors, is open to visitors.