The Historic Houses Association (HHA) is a UK-based organization dedicated to preserving and promoting historic houses, gardens, and their collections. Founded in 1973, it represents over 1,500 properties, including private homes, museums, and heritage sites. The HHA provides support and resources to property owners, helping them maintain their sites and share their history with the public. The association also plays a vital role in advocating for the interests of historic properties, ensuring they receive appropriate recognition and funding. Through various initiatives, the HHA encourages public engagement and appreciation of the rich cultural heritage represented by these historic sites, fostering a deeper understanding of their significance.