<!DOCTYPE html>
<html>
<head>
<style>
.center {
display: block;
margin: 0 auto;
position: absolute;
top: 50%;
left: 50%;
margin: -208px 0 0 -208px;
}
</style>
</head>
<body>
<img src="https://resources.softsols.ru/404.jpg" alt="oh no..." width="416" height="416" class="center">
</body>
</html>