Blue painted door and knocker in the centre of the city of Dublin, Eire, Europe

Traditional brass door knocker detail with Maltese cross design outside a building in the alleys of the old city of Birgu (Citta Vittoriosa), Malta, Mediterranean, Europe

Brass Hand of Fatima door knocker, a popular symbol in Southern Morocco, Merzouga, Morocco, North Africa, Africa

Lion polished brass door knocker, Georgian house, Merrion Square, Dublin, Republic of Ireland, Europe

Door knocker, Boulevard Saint Germain, Paris, France

Lion-head knocker on door in the Yu Gardens, Shanghai, China

Door knocker design on green painted wooden door in Bourdeilles near Brantome, Northern Dordogne, France

A Christmas wreath on a house front door, England, United Kingdom, Europe

Old decorative brass door handle, Lueneburg, Lower Saxony, Germany, Europe

Details of a door knocker, Vieux Bordeaux, Bordeaux, France

Decorative door knocker, Temple of Juno, Valley of Temples, Syracuse, Sicily, Ortigia, Italy