Turin,
The 757 fuselage is more or less the same tube as the 737,727,707...
Initially the 757 development drawings showed the "standard" Boeing narrowbody nose. Even a T-tail was contemplated.
However when the commonality with the 767 came about (it was not a design criteria from the outset) the nose and window shape was designed so as to allow the commonality and a similar view from both flightdecks. And very successfully. Good looking airplane.