Moulded string course below, with carved gargoyles.
Chancel arch, C13, with continuous deep roll mouldings, - no shafts or capitals.
South arcade, C13, has moulded round arches, and piers with attached shafts with stiff leaf caps.
North arcade, originally C13, with similar arches, but piers rebuilt or altered clumsily in C19.
On north aisle wall, monument to Audeley and Margaret Grey, 1723, with Corinthian pilasters supporting entablature and crest.
On west wall of aisle, monument to George Pitt, 1784, surmounted by carved bust.
Late medieval stained glass in aisle windows.
St Michael's churchyard has the grave of Thomas Hardy's family. Thomas Hardy's heart is buried there - his ashes were interred at Poets' Corner, Westminster Abbey.
Tower arch, C14, has shafts with moulded caps.
The "Mellstock Church" of Thomas Hardy's novels. (RCHM Monument 1 Dorset Vol II)