The Daily Telegraph and Courier was first published in 1855, on a Friday late in June, just as the penny tax on newspapers was repealed.

The Daily Telegraph and Courier is founded by Colonel Arthur B. Sleigh in June 1855.

The paper moves from The Strand to 135 Fleet Street.

The Telegraph proclaims itself to have the “largest circulation in the world”, a boast that appears in advertisements on the side of horse-drawn trams.

The first daily crossword in a British newspaper is published. The first clue is ‘Author of “Childe Harold”,’ to which the answer was Byron.

The paper merges with rival publication the Morning Post to become the Daily Telegraph and Morning Post.

In August, Telegraph correspondent Clare Hollingworth has 'the scoop of the century', breaking the news of World War II after she spots German tanks on the Polish border.

British Intelligence closely monitors the public reaction to a competition in The Daily Telegraph to complete the crossword in 12 minutes. Some of the contestants are contacted by the War Office and asked to come and work in the code-breaking division at Bletchley Park where they attempt to break German military code.

The Sunday Telegraph launches.

The paper changes its name from The Daily Telegraph and Morning Post to The Daily Telegraph.

New presses see the first full colour issue and new technology means the paper becomes ‘all-electronic’.

The Telegraph headquarters move from Fleet Street, first to the Isle of Dogs and then to Canada Tower in Canary Wharf.

The Telegraph becomes the first newspaper in Britain to produce an online website, with the launch of the Electronic Telegraph.

The feared Millennium Bug fails to trigger the “electronic meltdown that some experts had predicted”, The Telegraph reports.

The paper headquarters move to its current location, above London Victoria station.

The paper achieves one of its biggest scoops with the publication of MPs' expenses files.

The Telegraph launches a mobile and tablet app, helping to keep readers up to date while on the move.

The Telegraph becomes the No 1 quality news brand in the UK with more than 25 million unique users.

TMG announced that it was transforming its business to be subscription led, and set the strategic goal of reaching 1 million subscriptions by 2023. The Telegraph celebrates 30 Years of Matt cartoons. The Telegraph’s investigation into the British Me Too scandal is published. The Sunday Telegraph celebrated its 3,000th edition on Sunday 16 December.

The Telegraph, the first national newspaper in Britain to launch a website, marks 25 years of telegraph.co.uk. The homepage of the website was also relaunched.

TMG begins publishing its monthly subscription figures and passes the milestone of 500,000 subscriptions. The Telegraph wins 11 awards at the National Press Awards, including the News Website of the Year. The Telegraph’s Coronavirus Charity appeal raises over a million pounds through donations from its readers to support those suffering from the knock-on effects of Covid-19.

The new Telegraph app is launched combining the daily edition of The Telegraph newspaper with live 24-hour news coverage. The Telegraph, the first UK daily national paper to introduce a print subscription service, celebrated 25 years of print subscriptions, and ended the year with 720,000 subscriptions.

In January 2023, the paper obtained more than 100,000 WhatsApp messages sent between Matt Hancock and some of the most senior people in government at the height of the Covid-19 pandemic.

The conversations shed new light on issues including: Care home deaths, lockdowns, testing, school closures and face masks.

In March 2023, Telegraph Media Group announced it had acquired The Chelsea Magazine Company (CMC), an independent publisher of lifestyle content.

In August 2023, TMG set a record for its subscription-first business, reaching one million subscriptions.