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NEWS: Due to the current international situation with the Covid-19 virus, the decision has been made to postpone the CVMA Colloquium and Forum that was to be held in Barcelona in July.

Although there is a chance that we may overcome the pandemic before July, there is still the issue of restrictions on movement to consider for many of the members of the international organization. Therefore the decision of postponement has been brought forward so that the cancellation of flights and hotel bookings can be carried out.

We apologize for this disappointing news but our priority is to give colleagues clarity on the situation at this challenging time and to safeguard their health.


The Forum is organised by the Catalan Corpus Vitrearum and the International Scientific Committee for the Conservation of Stained Glass in conjunction with the Institut d’Estudis Catalans. Other local institutions take part also in this meeting. Registration is from Thursday 9th July. For those also attending the CVMA Colloquium, registration will be open on Monday 5th July 2021.

Site visits are planned for 8th July (also with papers and presentations), followed by a two-day programme of papers and presentations at the Seminari Conciliar de Barcelona (Carrer Diputació, 231 – Barcelona). There will be also optional visits.


The fragmentary nature and fragility of stained glass is widely accepted. To a greater or lesser extent, historic stained glass windows, exposed to physical attack and weathering conditions over time, have suffered damage that has altered their appearance. These deteriorations are in addition to changes introduced by restorations, reconstructions and interventions of varying size and degree.  All of these factors impact on the stained glass windows that we see today. Those responsible for maintaining this heritage face a series of decisions with every intervention they make, that are of great importance for the future reading and understanding of these pieces.

The theme of this Forum will focus on the preservation of the ‘identity’ of the historic stained glass in the intervention process. The search for balance between the values embodied in these pieces is a matter of great importance for the correct conservation of this fragile heritage. This Forum will offer the opportunity to reflect upon and bring new solutions to this complex subject. The response to this theme is a key factor in the creation of conservation plans, which can ensure the correct transference of the piece to future generations. How should we combine the conservation requirements of the window with respect for all of the historic materials in and around it? How far can we get without diminishing the integrity of the piece? How to make alterations in the surface or structure of the work respect its antiquity and originality?  At what stage, or level of quality, does an intervention gain historic value?


Anyone who wants to submit a communication proposal or poster, should contact their national committee before June 2019. Marking your submission ‘Forum 2020’.

Initial proposals are for papers or posters of no more than 2500 characters (including spaces) in length. If your proposal is accepted, you will be expected to supply an article of 26000 characters (including spaces). No oral presentation will be accepted without submission of a satisfactory preprint article.

Languages: Oral presentations, preprint articles and posters will be accepted in the three official languages of the Corpus Vitrearum: English, French and German.