Verulamium was destroyed in the rebellion of Boudica in 60 or 61, but was soon rebuilt. Its forum and basilica were completed in 79 or 81, and were dedicated in an inscription by the governor, Gnaeus Julius Agricola, to the emperor Titus. Its theatre, the first Roman theatre in Britain, was built ca 140. An inscription records that the civitas of the Catuvellauni were involved in the reconstruction of Hadrian's Wall, probably in the time of Septimius Severus in the early 3rd century. Saint Alban, the first British Christian martyr, was a citizen of Verulamium in the late 3nd or early 4th century, and was killed there. The city took its modern name from him. The tombstone of a woman of the Catuvellauni called Regina, freedwoman and wife of Barates, a soldier from Palmyra in Syria, was found in the 4th century Roman fort of Arbeia in South Shields in the north-east of England.

Hatfield House, is a country house set in a large park on the eastern side of the town of Hatfield, Hertfordshire, England. The present Jacobean house was built in 1611 by Robert Cecil, First Earl of Salisbury and Chief Minister to King James I and has been the home of the Cecil family ever since. It is currently the home of Robert Gascoyne-Cecil, 7th Marquess of Salisbury. Henry VIII's children Edward and Elizabeth spent their youth at Hatfield Palace. In 1548, when she was only 15 years old, Elizabeth was under suspicion of having illegally agreed to marry Thomas Seymour. The House and her servants were seized by Edward I's agent Robert Tyrwhit, and she was interrogated there. She successfully defended her conduct with wit and defiance. Seymour was executed in 1549 for numerous other crimes against the crown. After her two months of imprisonment in the Tower of London by Queen Mary, Elizabeth returned to Hatfield.
The Queen Elizabeth Oak on the grounds of the estate is said to be the location where Elizabeth was told she was Queen. In November 1558, following the death of her sister Mary Tudor, she held her first Council of State in the Great Hall, where marriages now take place and evening banquets are served throughout the year. This celebrated Jacobean house, which stands in its own Great Park, has been in the Cecil family ever since, and is the home of the Marquess of Salisbury.

Knebworth village in the north of Hertfordshire, first a Saxon settlement on the old Great North Road, between Stevenage and Woolmer Green. Edward the Confessor gave the Manor of Knebworth to his Thane Aschil. After the Conquest, the Manor and Fort were granted by William I to his favourite counsellor, Eudo Fitzherbert, called Dapifer from his office as Steward of the Household. The Domesday Chenepeworde belonged to the Dane, Cnebba. The nearby Knebworth Park houses Knebworth House and St Mary’s Parish Church, parts of which date back to 1120. Knebworth House is the home of the Lytton family.

17th February 1490, Sir Robert Lytton, purchased Knebworth from Sir Thomas Bourchier for £800. Sir Robert fought with Henry VII at Bosworth and became Under Treasurer to the Household and a close confidant.