[{SlideShowNav}] !!!Caernarfon Castle (1) [{Image src='1820uk.jpg' width='800' alt='Caernarfon Castle (1)' class='image_left' height='542'}] [{SET customtitle='Caernarfon Castle (1)'}] \\ Heraldic banners decorate the walls of Caernarfon Castle, Wales, constructed by King Edward I following the conquest of Gwynedd. Begun in 1283, it reached it current state in 1323, but was never entirely completed.