Most of the original quadrangle still survives in some form, absorbed into the fabric of the working station: the officer's mess occupies what was once part of a substantial tower, three groin-vaulted cellars survive below ground, and a blocked doorway in the western wall still carries foliage carvings in its spandrels, the triangular spaces between the arch and its frame. Above it, a wall plaque bearing the defaced shield of the Archbishop of Dublin retains the motto "Virtus Nobilitat" in raised Roman capitals. Medieval roof timber has been recorded on the second floor at the south-west corner. It is, by any measure, a peculiar layering of institutional modernity over ecclesiastical antiquity.

The palace of Sepulchre was established in 1184 by Archbishop John Comyn, the first Anglo-Norman archbishop of Dublin, sited outside the city walls to the south-east of St. Patrick's Church. Three archbishops left their mark on the fabric: John Cumin, who held the see from 1181 to 1213; Hugh Inge, archbishop from 1521 to 1528, who inserted the fine doorway that still survives in the western wall and whose work has been compared in style with Dunsoghly Castle in county Dublin; and John Alen, who followed him from 1528 to 1534. Researcher Danielle O'Donovan has identified the complex as having included a great hall, a private chamber, a chapel, and possibly two towers, one of which stood close to what is now Marsh's Library. The chapel, mentioned in a document of 1367, served for private prayer, the ordination of priests, and administration; it appears to have been converted to parochial use in 1442 by Richard Talbot, and was out of use by the seventeenth century. A vaulted structure oriented east to west, further north in the complex, may represent the church itself. The palace was not always well maintained: an inquisition of 1326 described the hall as badly roofed with shingles and unsafe, the kitchen and chapel similarly derelict, and a prison already broken and thrown down. The gardens were damaged in 1316 by the king's army. In 1926, during drainage works, the skeletons of two men and a child were uncovered in the courtyard, with further human bones found in the front yard.

Kevin Street Garda Station is an active working station and not open to casual visitors, so the medieval fabric is not publicly accessible in any formal sense. The exterior of the building sits on Kevin Street Upper, close to the junction with Bride Street, and the surrounding streetscape still carries a faint sense of the old ecclesiastical precinct; Marsh's Library, one of Ireland's oldest public libraries, stands immediately adjacent and is open to visitors. Archaeological assessments carried out between 2004 and 2008 identified a medieval ditch running parallel to Kevin Street, filled with dark-green clay, and confirmed that late twelfth-century settlement extended across much of the area. Anyone with an interest in Dublin's layered urban archaeology might find it worth pausing here, knowing that a largely intact medieval quadrangle persists just out of sight behind an ordinary institutional facade.