Queen Camilla beamed today as she stepped out in London to unveil the foundation stone for a sacred building which is being constructed in honour of King Charles.

The Queen visited Westminster Abbey to unveil The King Charles III Sacristy’s foundation stone, the building of which is located on the grounds of the Abbey. She was joined by her sister, Annabel Elliot, who also appeared alongside her at a charity fundraising event at Kew Gardens on Tuesday.

The sacristy will house state-of-the-art welcome, security and ticketing facilities, allowing the Abbey itself to be preserved as a sacred space.

Camilla, who is patron of the Westminster Abbey Sacristy Project, looked stunning in a black polka dot shirt dress by Fiona Clare, reminiscent of the Princess of Wales’s recent outing in London wearing a similar ensemble.

She was welcomed by the Dean of Westminster before she met the sacristy’s architect, Ptolemy Dean.

The Queen was also seen greeting Prince William‘s close pal and Princess Charlotte’s godfather, Thomas van Straubenzee.