Another step towards the complete renovation of the castle facade was taken on June 18, 2014, with the unveiling of a large banner to the public. After large individual donations increased the total amount donated to the Electoral Palace to over €700,000, a large banner sponsored by media partner VRM is now advertising for further donations to preserve the original building fabric.

Another €250,000 is needed to fulfill the commitments made by the German Foundation for Monument Protection and the Mainz Monument Network to the city of Mainz. In return, the city has also pledged €1 million to help accomplish this major task. "The tenders for the project, which will cost over €2 million, have been issued," said Mayor Michael Ebling. Erika Friderichs from the Monument Network is also optimistic that the goal can be achieved together.