A brief timeline for the city of Rome to the fall of the Western Empire.

The Monarchy
753 BC Legendary founding of the city by Romulus. Iron Age settlement on the Palatine already exists
600 BC? Forum drained by Cloaca Maxima
509 BC Last King, Tarquin the Proud, exiled from Rome
The Republic
450 BC Twelve Tables - first Roman law code
394 BC Rome becomes dominant over the Latin peoples
387 BC Rome sacked by Gauls.
378 BC City wall rebuilt along Servian line
312 BC Construction of the Via Appia
272 BC Rome controls Italy
264 BC First recorded Gladiatorial games
55 BC Pompey's theatre built
46 BC Caesar builds first Imperial Forum
44 BC Caesar Assassinated
31 BC Augustus becomes political master of Rome
The Empire
27 BC Agrippa's complex built, including the Pantheon
13 BC Theatre of Marcellus built
64 AD Great fire in Rome, Nero begins Domus Aurea
68 AD Year of the four Emperors
80 AD Colosseum constructed
216 AD Baths of Caracalla Constructed
260 AD Tolerance of Christianity by decree
271 AD Aurelian wall constructed
324 AD Founding of Constantinople, decline of Rome begins
410 AD Rome sacked by Goths under Alaric
455 AD Vandals under Gaiseric sack the city
476 AD Odoacer forces retirement of last Emperor in the west