ALT A photo of a modern conference hall filled with seated attendees using laptops and taking notes during a formal event. At the front right, a man stands at a lectern speaking, with EU branding visible nearby. The European Commission logo appears in the top right corner, and a '20 YEARS' badge is shown in the top left. Overlaid graphic text reads 'WELCOME TO DAY 1 OF #EUSEW2026,' with additional branding at the bottom left stating '#EUSEW2026 European Sustainable Energy Week.'

ALT Visual of an aerial view of a modern multi-story apartment building with solar panels installed across its rooftop. Overlaid text reads 'Fact page' and 'Energy renovation of buildings' in white letters on a light green background. Residential buildings and trees are visible in the surrounding neighbourhood. The image has a soft green and yellow gradient overlay, and the European Commission logo appears in the bottom-right corner.

ALT Visual for the EU Building Stock Observatory. Large white text reads 'EU Building Stock Observatory' with the subtitle 'Explore the latest data!' on a light blue background. A blue-tinted aerial cityscape appears on the right, overlaid with a magnifying glass showing a colourful thermal image of buildings. The European Commission logo is displayed in the bottom-left corner.

ALT A modern building under construction in the background, overlaid with a semi-transparent yellow and green frame. In the foreground, the text reads 'Fact page: Energy renovation of buildings'. The bottom left shows the hashtag #EPBD, and the bottom right features the European Commission logo.