14. International Congress on the Deterioration and Conservation of Stone


Please note:

Your field trip booking shall only be valid if both your conference and your excursion fee have been paid into the conference account in full.
If you are interested in taking part in a field trip that already is fully booked, please contact the conference secretary in order to get on the waiting list.
In case that you have to cancel your participation in a field trip, please let the conference secretary know at the soonest. There may be other conference delegates on the waiting list for this field trip.
If we have to cancel a field trip because there are too few participants, we will inform you per e-mail ASAP, and the excursion fee will be refunded fully. Reimbursements etc. will be handled on site in Münster at the registration desk in cash. However, please note that no reimbursement can be given for cancellations later than Wednesday, 16 April 2020, because at this time, we already have booked the busses, etc.

In case you are interested in an excursion please send an e-mail to:


We will let you know further details!


Excursion I
Excursion II – 12.09. 2020


Romanesque and Renaissance Architecture exposing Natural Building Stones in the Weser River Region (Excursion guide: Jochen Lepper)

Carolingian-Romanesque “Westwerk” of the former Corvey Abbey

The uplands of both sides of the Weser river valley expose a wide range of various sedimentary building and ornamental stones. Most oft them are sandstones, some other limestones and all together of mesozoic age. They were used as building stones as well as masoned or sculptured ornamental stones for medieval churches such as the former abbey church Corvey (9th and 12thCentury), actually appointed as a prominent UNESCO World Cultural Heritage ensemble.
Other sandstones and distinct limestones are used for prominent castles and bourgois townhouses of Renaissance time.

Renaissance Castle Hämelschenburg exposing two different "Keuper" sandstones exploited nearby

Renaissance Castle Hämelschenburg exposing two different “Keuper” sandstones exploited nearby

The one-day long excursion of appr. 250 – 300 km will visit along the Weser river the Romanesque Abbey Church Lippoldsberg, the Carolingian/Romanesque ‘Westwerk’ (West front) of Corvey Abbey and the Romanesque/Gothik Monastery Church Amelungsborn, made of ‘Buntsandstein’ (Lower Triassic); the Renaissance Moated Castle Hehlen of ‘Muschelkalk’ (Middle Triassic),
the Renaissance Castle Hämelschenburg made of two varieties of ‘Keuper’ sandstone (Upper Triassic), and a Renaissance townhouse in Hameln, made of Wealden sandstone (Lower Cretaceous).
All these exposed building stones will be studied on this excursion. Additionally aspects of local availibility, material qualities, specific applications and weathering phenomena of the different building stones will be considered.

Start: 7:30 h from Göttingen; Arrival in Göttingen between 18:00h and 19:00h

Max. 15–20 participants | Fee: € 80

Excursion guide: J. Lepper (Hannover)


EXCURSION III    12.09.2020 and/or 13.09.2020


Six churches and a castle – rural architecture in southern Lower Saxony (Excursion guide: Frank Wiese)

Off the beaten tracks, the excursion introduces medieval and modern church architecture in rural Lower Saxony. A very specific regional church style is the tower church, which presumably originated in the middle of the 13th century. Characteristically, it first consisted of an isolated, multistore church tower, in which the upper stories were used for secular affairs (e.g. storage of goods, protection). Eventually, a nave was added subsequently (St. Johannis church Lütgenrode, chapel of Wolbrechsthausen). The classic medieval Romanesque church floor plan (W to E: tower, nave, chorus) and a Gothique reconstruction phase can be demonstrated in an excavation site of an unkown 13th century church near Asche. We will visit this site while archaeologists are excavating. The Muthaus of the Hardeg castle and the St. Mauritius church (Hardegsen) convey an impression of more sophisticated stone use in a small rural centre.

St. Vitus Church (Erbsen), view from the E to the W. The apse is result of a modern, neo-romanesque reconstruction with an excessive use of Holocene travertine (provenance: presumably Thuringia near Heiligenstadt/Mühlhausen?)

In numerous cases, 18th to 19th century reconstruction phases obliterated typical medieval floor plans and Romanesque/Gothique architectural elements. Traditional building stones were used in a new style, and new building stones appeared due to the development of the railway system and the possibility to easily import building stones from more remote, neighbouring federal states (e.g. Thuringia). This is demonstrated by the St. Vitus church (Erbsen).

Excavation site of an unknown 13th century church near Asche. The analysis of a ruin enables also the view into the walls and the inventory of all natural stones used – so far, stones from 8 different stratigraphic levels are proven, each of which used for a very specific porpose. Picture: Jan Stubenitzky

In some cases, the medieval churches were pulled down and rebuilt completely with a mixture of new building stones and spolias of the pulled-down church (St. Martini church, Lenglern).

All relevant natural building stones in medieval and modern church/castle construction of the area are introduced, masonry techniques are shown and amazing examples of unlucky choices of building stone and their deterioration are presented and discussed.


Start: 7:30 h from Göttingen; Arrival in Göttingen between 18:00h and 19:00h

Max. 15–20 participants | Fee: € 50

Excursion guide: F. Wiese (Göttingen)