1521 in Roman Numerals
1521 is written MDXXI in Roman numerals, 505 years in the past. Reading left to right, M + D + X + X + I add up to 1521, which is exactly why Roman-numeral years suit tattoos and dedications: the letters carry the date without a single Arabic digit.
How MDXXI is formed
M + D + X + X + I = 1000 + 500 + 10 + 10 + 1 = 1521.
Where MDXXI is used
A year numeral turns up in different places from a bare number. These are the four that send people looking for MDXXI.
- Date tattoos and engravings. A year-only piece is just MDXXI, and a full date stacks the day and month above it. MDXXI is 5 characters long, which matters more than people expect: it sets how wide the bottom line of a stacked date will sit.
- Copyright lines in credits. Film and television end credits have long set the copyright year in Roman numerals, so a production from 1521 carries MDXXI on its end card. If you are reading a numeral off a title sequence rather than writing one, this is usually the one you have found.
- Cornerstones and dedications. Buildings, monuments and foundation stones carry their year in numerals, which is why MDXXI turns up carved rather than typed. Every year between 1500 and 1599 opens with MD, so on a datestone it is the letters after MD that tell you which year you are actually looking at.
- Anniversaries. In 2026, a date from 1521 is 505 years old, so MDXXI is the numeral for a 505th anniversary this year. Wedding and birth years are the two most common reasons to want MDXXI written correctly.
Convert another year or number
1521 is written MDXXI in Roman numerals.
Frequently asked questions
How do you write the year 1521 in Roman numerals?
The year 1521 is written MDXXI. Reading left to right that is M (1000) + D (500) + X (10) + X (10) + I (1), added together to reach 1521.
Why does MDXXI start with MD?
MD is the numeral for 1500, and every year from 1500 to 1599 opens with it. The letters after it, XXI, carry the remaining 21.
Is MDXXI the same as 1521 on a clock?
No. Clock faces only run to XII, so a year never appears on a dial. MDXXI belongs on dates: credits, cornerstones, engravings and tattoos. A numeral read off a watch face is an hour between I and XII, not a year.
How is the year 1521 different from the number 1521?
They share the numeral MDXXI, but the year page focuses on dates, tattoos and dedications, while the number covers counting, chapters and general use. Same letters, different context.
Years people look up next
The decade anchors either side of 1521, its immediate neighbours, and the quarter and half century marks that anniversaries land on.