Translation:Outside the city there is a historic palace.
I'm a history student at grad school at an American university. We distinguish between "an historic" and "ahistoric." When speaking in class, we are careful not to say "a historic" because precision is necessary, and American culture has been infested with ahistoric information. In educated English, "an historic" is preferred, but we recognize that "a historic" is commonly used, and equally defensible.
'an' is only used with certain pronunciation of the 'h'. 'hour' is pronounced with a silent h, so 'an hour'. 'historic' is pronounced with an audible 'h', so 'a historic something'. See also http://oxforddictionaries.com/words/a-historic-event-or-an-historic-event
Yes, I agree with your comment about the audible or soft pronunciation of the h. However, use of the article a with historic and historical is a bit variable as some speakers pronounce them with a soft h with which the "an" is more appropriate. Note however that the same speakers usually pronounce history with a more voiced h and so would use the article a. Thanks for your comment.
Many people don't pronounce the "h", but whole point of this discussion is that both pronunciations should be accepted. I'm not suggesting that people who answer "a historic castle" should be marked wrong and lose a heart, just that DL should also accept "an historic castle".
We're translating into English and those translations need to accept a variety of English usages.
I am English and I do say "an historic moment". In the UK the way you speak can define your position in society. Some people, common criminals and car thieves and others who pronounce "historic" with a hard "haitch" (the letter H) say "a historic moment" or "a hotel", but posh people, or those who aspire to be, use "an". Listen to the queen (of England, are there others?), that's what she says and, without me being sarcastic, so do most educated speakers of UK English. Enjoy it, use "a" or "an", that's why we learn other languages.
Gordon you sound like a bit of a snob. People speaking regional accented English (many of whom are highly educated thank you very much) would say 'a historic moment', because the h is there to be pronounced. Both 'a' and 'an' are acceptable depending on what kind of English you speak. Kindly refrain from making further ridiculous assumptions about people you've never met.
I would advise anyone trying to learn English to NOT use the Queen as a model. The queen and some of her relatives are renowned in Britain for speaking with a somewhat particular almost other-worldy accent. This isn't a political point, just a language point. Some of the royals make me think of Radio Moscow announcers in the late 70s (I listened out of interest on SW as a kid) - they sounded like the poshest of posh English people that had never existed - a mystery to me where they got their accents from.
It all depends on where you come from. The rule is that if one pronounces the 'h', as in historic, then it is correct to use 'a' (a historic). If you drop the 'h' and say 'istoric' (most certainly the Queen would never pronounce it like that, contrary to some of the misinformed opinions here), then you would say 'an'. So, use an before a word with a vowel SOUND, and use a before a word that starts with a consonant SOUND. :) Let the arguing being. :o) And, as further evidence, see here: https://books.google.com/ngrams/graph?content=a+historic%2Can+historic&case_insensitive=on&year_start=1800&year_end=2008&corpus=18&smoothing=3&share=&direct_url=t4%3B%2Ca%20historic%3B%2Cc0%3B%2Cs0%3B%3Ba%20historic%3B%2Cc0%3B%3BA%20historic%3B%2Cc0%3B%3BA%20Historic%3B%2Cc0%3B%3Ba%20Historic%3B%2Cc0%3B.t4%3B%2Can%20historic%3B%2Cc0%3B%2Cs0%3B%3Ban%20historic%3B%2Cc0%3B%3BAn%20Historic%3B%2Cc0%3B%3BAn%20historic%3B%2Cc0%3B%3Ban%20Historic%3B%2Cc0%3B%3BAN%20HISTORIC%3B%2Cc0
You are right....but boy, this is my pet peeve. Drives me nuts.....lol. Just to flog this dead horse once more, the English grammar rule is to use 'a' before a consonant SOUND (e.g, history, heart, hotel) and an before a vowel SOUND (e.g., 'hour' where the consonant 'h' is not pronounced). However, you may live in a region where the consonant sound in words such as 'herb' (pronounced erb in many places) is dropped. In that case, the word starts with a vowel SOUND and is used with 'an'.
'An' historic palace is perfectly correct British English and should therefore be accepted and not deemed to be a 'typo.' You will hear both 'a' and 'an' in everyday spoken English but the correct form is 'an' historic/historical but 'a' history (e.g. A History of the English speaking Peoples). It is also 'an' hotel, although some people may find this, and the distinction, old fashioned or pedantic.
In Ireland we pronounce the 'h' of historic but saying 'a historic' seems unnatural to me, 'an historic' sounds correct. I think both should be accepted by Duo.
I really despise the fact Duo is mainly in yank pidgin english and uses the yank flag to represent the english language. Not cool Duo, not cool.