The richly decorated five-stage tower, 135-feet high, with its four striking hexagonal turrets, was begun in 1506 and is ascribed to William Hart of Bristol.
An example of the Somerset type, it contains 30 niches and is graced by many statues and carvings including those of an arrow and a deer, the attributes of Saint Giles.
It is thought that the tower may have been an inspiration for Victoria Tower, at the Palace of Westminster.

The nave arcade is in the Decorated style, and dates from the 14th century, but the remainder of the church is in the late Perpendicular style, and includes an unusual polygonal chancel, similar to that at Holywell, and an echo of the one in the contemporary Henry VII Chapel at Westminster Abbey.

Above the present chancel arch are large parts of an early 16th-century Doom painting, and the arch beneath shows striking evidence of the tracery which one filled it.
The interior of the church contains notable carvings and statuary dating from the 14th century and the 16th century camberbeam wooden roof is adorned with wooden polychrome angels playing musical instruments.
The church contains numerous monuments, including an elaborate sculptured memorial by Roubiliac.
The brass eagle lectern was presented to the church in 1524.

There are windows by the studio of Burne-Jones in the north aisle and a series of windows by Charles Eamer Kempe and C.E. Kempe and Co in the south aisle.
The lyrics of the Evangelical hymn "From Greenland's Icy Mountains", written by Reginald Heber, are etched on a window.
The hymn was both composed and first performed at the Church in 1819.

The church contains a medieval effigy which was found buried in the churchyard at the beginning of the 19th century.
This depicts a Welsh knight, bare-headed with long hair, who holds a shield emblazoned with a lion rampant and the words 'HIC JACET KENEVERIKE AP HOVEL' ('Here lies Cyneurig ap Hywel').

Just west of the tower is the grave of Elihu Yale, after whom Yale University in the United States is named.
The tomb was restored in 1968 by members of Yale University to mark the 250th anniversary of the benefaction.
It is inscribed with a self-composed epitaph beginning with the following lines:
Born in America, 

in Europe bred, 

In Africa travell'd and in Asia wed, 

Where long he liv'd and thriv'd; 

in London dead
The churchyard is entered through wrought-iron gates, completed in 1720 by the Davies Brothers of nearby Bersham, who had been responsible for the gates of Chirk Castle, perhaps the finest example of wrought-iron work in Britain, and also made gates at Sandringham House, and at Leeswood Hall, near Mold in Flintshire.

In 2012, wrexham.com placed a webcam pointed at St Giles giving a live view of the church.
June 2012 saw a beacon being lit on top of St Giles as part of the Queen's Diamond Jubilee celebrations.

Since 2012, its interior has been re-ordered to include a re-modelling of the Chancel as St David's Chapel, and its north aisle is the home of the regimental chapel of the Royal Welch Fusiliers (now part of the Royal Welsh).
The richly decorated five-stage tower, 135-feet high, with its four striking hexagonal turrets, was begun in 1506 and is ascribed to William Hart of Bristol. An example of the Somerset type, it contains 30 niches and is graced by many statues and carvings including those of an arrow and a deer, the attributes of Saint Giles. It is thought that the tower may have been an inspiration for Victoria Tower, at the Palace of Westminster.
The nave arcade is in the Decorated style, and dates from the 14th century, but the remainder of the church is in the late Perpendicular style, and includes an unusual polygonal chancel, similar to that at Holywell, and an echo of the one in the contemporary Henry VII Chapel at Westminster Abbey. 
Above the present chancel arch are large parts of an early 16th-century Doom painting, and the arch beneath shows striking evidence of the tracery which one filled it. The interior of the church contains notable carvings and statuary dating from the 14th century and the 16th century camberbeam wooden roof is adorned with wooden polychrome angels playing musical instruments. The church contains numerous monuments, including an elaborate sculptured memorial by Roubiliac. The brass eagle lectern was presented to the church in 1524. 
There are windows by the studio of Burne-Jones in the north aisle and a series of windows by Charles Eamer Kempe and C.E. Kempe and Co in the south aisle. The lyrics of the Evangelical hymn "From Greenland's Icy Mountains", written by Reginald Heber, are etched on a window. The hymn was both composed and first performed at the Church in 1819.
The church contains a medieval effigy which was found buried in the churchyard at the beginning of the 19th century. This depicts a Welsh knight, bare-headed with long hair, who holds a shield emblazoned with a lion rampant and the words 'HIC JACET KENEVERIKE AP HOVEL' ('Here lies Cyneurig ap Hywel').
Just west of the tower is the grave of Elihu Yale, after whom Yale University in the United States is named. The tomb was restored in 1968 by members of Yale University to mark the 250th anniversary of the benefaction. It is inscribed with a self-composed epitaph beginning with the following lines:
Born in America, 

in Europe bred, 

In Africa travell'd and in Asia wed, 

Where long he liv'd and thriv'd; 

in London dead
The churchyard is entered through wrought-iron gates, completed in 1720 by the Davies Brothers of nearby Bersham, who had been responsible for the gates of Chirk Castle, perhaps the finest example of wrought-iron work in Britain, and also made gates at Sandringham House, and at Leeswood Hall, near Mold in Flintshire.
In 2012, wrexham.com placed a webcam pointed at St Giles giving a live view of the church. June 2012 saw a beacon being lit on top of St Giles as part of the Queen's Diamond Jubilee celebrations.
Since 2012, its interior has been re-ordered to include a re-modelling of the Chancel as St David's Chapel, and its north aisle is the home of the regimental chapel of the Royal Welch Fusiliers (now part of the Royal Welsh).
St Giles' Church, Wrexham