The original Lady Chapel was formed in the south transept by screening it off from the crossing.
 The altar of the Blessed Virgin Mary was housed in the eastern arch of the transept.
There are traces of painting both on the east wall and under the arch.
The painting delineates the location of the mediaeval north screen of the Lady Chapel.
Around 1490 this chapel was extended westwards by piercing the western wall with a large arch and building the chapel's nave against the existing south aisle of cathedral.
 From within the Lady Chapel the upper parts of two smaller clerestory windows may be seen above the chapel's chancel arch.
 Subsequently, a screen was placed under the arch and the modern Lady Chapel formed in the 1490 extension.

The south transept is of early Decorated style.
The eastern wall of it is a single wide arch at the arcade level.
There are two doorways in the arch, neither of which is used, the northern one being hidden by the memorial to Dr William Franklin.
The south wall starts plain but part way up is a notable monument to Richard Watts, a "coloured bust, with long gray beard".
According to Palmer there used to be a brass plaque to Charles Dickens below this but only the outline exists, the plaque having been moved to the east wall of the quire transept.
The west wall is filled by the large arch mentioned above with the screen below dividing it from the present Lady Chapel.

The Lady Chapel as it now exists is of Decorated style with three lights along southern wall and two in the west wall.
The style is a light and airy counterpart to the stolid Norman work of the nave.
The altar has been placed against the southern wall resulting in a chapel where the congregation wraps around the altar.
The window stained glass is modern and tells the gospel story.

The first, easternmost, window has the Annunciation in the upper light: Gabriel speaking to Mary (both crowned) with the Holy Spirit as a dove descending.
The lower light shows the Nativity with the Holy Family, three angels and shepherds.
The next window shows St Elizabeth in the upper light surrounded by stars and the sun in splendour device.
The lower light shows the Adoration of the Magi with Mary enthroned with the Infant.
The final window of the south wall has St Mary Magdelene with her ointment surrounded by Tudor roses and fleurs-de-lis in the upper light with the lower light showing the Presentation in the Temple.
The west wall continues with St. Margaret of Scotland in the upper light surrounded by fouled anchor and thistle roundels.
The reference is to the original dedication of the cathedral as the Priory of St Andrew.
The lower light shows the Crucifixion with Mary and St Peter.
The final window is unusual, the upper light is divided in three and shows King Arthur with the royal arms flanked by St George on the left and St Michael on the right.
The lower light shows the Ascension: two disciples to the left, three women with unguents to the right and three bare crosses top right.

The first four windows have various dedications in the lower border, but the fifth has the cathedral, Kent and Rochester arms interspaced with the dedication: "To the Glory of God and in proud and abiding memory of the following Old Roffensians | who laid down their lives for their country in the Great War 1914–1918".
Below is a stone tablet with their names inscibed.
Under the fourth window is a slightly later tablet recording those of 1939–45.
The original Lady Chapel was formed in the south transept by screening it off from the crossing.  The altar of the Blessed Virgin Mary was housed in the eastern arch of the transept. There are traces of painting both on the east wall and under the arch. The painting delineates the location of the mediaeval north screen of the Lady Chapel. Around 1490 this chapel was extended westwards by piercing the western wall with a large arch and building the chapel's nave against the existing south aisle of cathedral.  From within the Lady Chapel the upper parts of two smaller clerestory windows may be seen above the chapel's chancel arch.  Subsequently, a screen was placed under the arch and the modern Lady Chapel formed in the 1490 extension.
The south transept is of early Decorated style. The eastern wall of it is a single wide arch at the arcade level. There are two doorways in the arch, neither of which is used, the northern one being hidden by the memorial to Dr William Franklin. The south wall starts plain but part way up is a notable monument to Richard Watts, a "coloured bust, with long gray beard". According to Palmer there used to be a brass plaque to Charles Dickens below this but only the outline exists, the plaque having been moved to the east wall of the quire transept. The west wall is filled by the large arch mentioned above with the screen below dividing it from the present Lady Chapel.
The Lady Chapel as it now exists is of Decorated style with three lights along southern wall and two in the west wall. The style is a light and airy counterpart to the stolid Norman work of the nave. The altar has been placed against the southern wall resulting in a chapel where the congregation wraps around the altar. The window stained glass is modern and tells the gospel story.
The first, easternmost, window has the Annunciation in the upper light: Gabriel speaking to Mary (both crowned) with the Holy Spirit as a dove descending. The lower light shows the Nativity with the Holy Family, three angels and shepherds. The next window shows St Elizabeth in the upper light surrounded by stars and the sun in splendour device. The lower light shows the Adoration of the Magi with Mary enthroned with the Infant. The final window of the south wall has St Mary Magdelene with her ointment surrounded by Tudor roses and fleurs-de-lis in the upper light with the lower light showing the Presentation in the Temple. The west wall continues with St. Margaret of Scotland in the upper light surrounded by fouled anchor and thistle roundels. The reference is to the original dedication of the cathedral as the Priory of St Andrew. The lower light shows the Crucifixion with Mary and St Peter. The final window is unusual, the upper light is divided in three and shows King Arthur with the royal arms flanked by St George on the left and St Michael on the right. The lower light shows the Ascension: two disciples to the left, three women with unguents to the right and three bare crosses top right.
The first four windows have various dedications in the lower border, but the fifth has the cathedral, Kent and Rochester arms interspaced with the dedication: "To the Glory of God and in proud and abiding memory of the following Old Roffensians | who laid down their lives for their country in the Great War 1914–1918". Below is a stone tablet with their names inscibed. Under the fourth window is a slightly later tablet recording those of 1939–45.
Rochester Cathedral