The cost of restoration was covered by voluntary subscription and Gonville and Caius College, the latter being the parish's principal landowner since 1570.
Some new fittings were also added, including a communion table, pulpit, reading desk and harmonium.
The reopening was brought forward to coincide with the Bishop's visit to Dorchester for an archaeological meeting.
[4] Holy Trinity is built of rubblestone with freestone dressings, and slate and stone tiles on the roofs.
[2] The window in the east wall of the chancel contains stained glass added in 1865 in memory of surgeon John Howship's wife Elizabeth.