Vintage early 20th century oak bevelled edge portrait wall hanging mirror this unusually large very heavy oak framed and bevelled edge always a sign of quality mirror has fittings to be hung portrait could be changed for landscape would look stunning in a hallway or bedroom etc some age related wear 
90 cm tall 53 cm wide 2 1/2 cm depth 
Bevelled edge mirrors, characterized by their angled, polished edges that reflect light, gained popularity in the mid-16th century when mirror production became more commercial. Initially, beveling was done by hand, a time-consuming process, but modern technology now allows for machine bevelling. The angled edge creates a subtle, stylish effect, and is a popular choice for adding elegance to home decor. 
Here's a more detailed look at the history:
Early Mirrors:
Before the 16th century, mirrors were often made of blown glass, resulting in curved surfaces and slightly tinted glass. 
Venetian Influence:
Venice, with its expertise in glassmaking, became a hub for mirror production, including the use of mercury-tin amalgams to create reflective surfaces. 
Hand Beveling:
The process of creating a bevelled edge was initially done by hand, requiring skilled craftsmanship and patience. 
Commercialization:
The mid-16th century saw the rise of commercial mirror production, making bevelled mirrors more accessible. 
Modern Bevelling:
Today, machine bevelling allows for more precise and efficient production, leading to a wider variety of bevelled mirror designs. 
Art Deco Era:
Bevelled mirrors were a popular feature in Art Deco design, known for their decorative metalwork and geometric shapes. 
Continued Popularity:
Bevelled mirrors remain a popular choice for their ability to enhance light, create an illusion of space, and add a touch of elegance to interiors.