in the most pleasant of homes in加形容词 是什么语法现象?

问题描述:

in the most pleasant of homes in加形容词 是什么语法现象?
来自It is not uncommon,in the most pleasant of homes,to see pasted on thewindows small notices announcing that the premises are under surveillance bythis security force or that guard company.

其实就是in home,形容词是修饰home的,可以和home连在一起当做一个整体来看.of怎么看