The church of St Just is medieval. There are no remains of the early medieval church and only part of the chancel remains from the church built in 1334 which was dedicated on 13 July 1336 by the Bishop of Exeter, John Grandisson. The current building dates from the 15th-century. In 1355 the church was given to Glasney College by Sir John de Beaupre together with the church lands of Lafrowda. Medieval chapels in the parish included a chapel of St Helen at Cape Cornwall and a chapel of St Michael on Chapel Carn Brea.
The church is large and built of regular granite blocks. Both the body of the church and the tower are of the 15th-century and the tower is of three stages. The aisles are built to the same design with alternating windows of two different patterns. The arcades have limestone piers. The font is modern but has been described as 14th-century in date. Two medieval wall paintings remain but they are both heavily restored; one portrays St George and the other a warning to breakers of the Sabbath.
The Selus Stone is thought to date from the late 5th or early 6th-centuries. It bears the Latin inscription Selus Ic Iacet (Selus lies here). This is thought to refer to Salomon of Cornwall, otherwise known as Saint Selevan.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.