1237  First priest, Thomas de St. Albans

1328  Licence granted by Bishop of Lincoln to Simon de Swanland, Lord of the manor, to build a church.  St. Catherine's Chapel  dates from this period.

1340/50  Chancel, nave and aisles much as they are today, but roof timbers not covered.

1348-51  Black Death caused over one million deaths in England.  Plans for a central tower abandoned.

1344-61  William de Kesteven vicar.  His brass on wall W of chancel.

1428  Thomas Knolles bought Manor of North Mymms from the de Swanland family, and probably built the W tower,   moving the Norman doorway.

1455-1471  War of the Roses battles in St Albans and Barnet.

1520  Elizabeth Frowick, granddaughter of the last Knolles, married John Coningsby from Lincoln.  Their family had influence in the parish for over 300 years.

c1590  North Mymms House built by Sir Ralph Coningsby.

1702  Lord Chancellor Lord John Somers bought Brookmans, dying there in 1716.  He is buried beneath the floor of the chancel.

1859  Major restoration to the church.  Vaults sealed, brasses removed from the floor, box pews removed, and the nave re-pewed.

1871  Further restoration, encaustic tiles laid in the Sanctuary, and choir stalls in the chancel.  During this time the blank wall between the chancel and St. Catherine's chapel was removed and replaced by the present partition.

1894  The piped organ installed.  Replaced by pipeless organ in 1991.

1921  Robed choir, now in the chancel.  Up until this time the patron and family had sat in the chancel, the choir in the chapel beside the organ.  Electric light installed.

1966  Roof re-tiled.

1969-71  Tower restoration, new kneelers, new heating, chapel floor exposed.

1977        Parish Room built after sale of Old Vicarage.

1991-2     Major restoration, including stonework of W doorway, new drainage and uncovering of Holy Water Stoup. 

1998        New Parish Room built, and called St. Michael's Room, after a former Chapel-of-Ease in Brookmans Park.