Hotel Margaret - Rome Italy

Hello,
looking for information on Hotel Margaret. We stayed there pre pandemic and would like to stay there again. The internet links from our old guidebook no longer work. Does anyone know if they are still in business and have internet information so we can contact them. From what we've seen it looks like they are there and use booking.com for bookings. We just can't find them when we go through booking.com?? TIA
Garry & Arla Thomas