There is no specified height.
You need to site it at a reasonable height for normal use.
On the door knocker of the front door
The main parts of a door knocker are the knocker (the metal piece that you strike on the door) and the strike plate (the metal plate attached to the door that the knocker hits). Some door knockers also have a decorative backplate that holds the knocker and strike plate in place on the door.
because he wanted to win the no bell prize
That's what the front door is for; for visitors. No 'decision' for permission is required. Your door-bell and your knocker is the invitation; even for strangers. Even if there's neither a door-bell or a knocker, anyone can come to your front door and knock. Even the police can come to your door, and have to knock or ring the bell to present you with a search warrant; or with a summons.
An old door knocker might be referred to as a "doorknocker" or as a "knocker." It is a piece of hardware attached to a door that is used for knocking to alert those inside.
The inventor of the door-knocker, Osbourn Dorsey, did not win any notable awards for his invention. He patented the door-knocker in 1878 as a way to notify homeowners of visitors in a polite manner.
1. Knocker at the door.2. A heavy brass knocker, set in the center of the massive expanse of wood, gleamed in the early morning light.3. Today, the sanctuary knocker hangs in the hall over the high table.4. In the days before bell pushes, no one would hear a door knocker in a house as large as Aston hall.
Marley appeared to Scrooge in several places, but all were at his house. The first glimpse Scrooge gets is in the doorknocker, and then in several places in his room, and finally Marley appears in full body, floating through the locked door to talk to him.
A door knocker can be made in any shape desired - even to look like a face, like in A Christmas Carol.
A posh door knocker is typically made from high-quality materials such as solid brass, chrome, or even silver. These luxury materials not only enhance the aesthetic appeal of the door knocker but also ensure durability and longevity. A posh door knocker may also feature intricate designs or engravings to further elevate its elegance.
One can purchase a brass door knocker from the following retailers: Amazon, Brass Gallery, The Door Knocker, Black Country Metal Works, eBay, Home Depot, Home Base, B&Q, Trade Me, Jefferson Brass, to name a few.
Some creative ideas for a front door cover to enhance your home's curb appeal include a decorative wreath, a colorful door mat, a stylish door knocker, a seasonal banner, or a custom-made door sign.