The way things are working out, we (family of 4 adults) will be visiting Belem on the last Sunday of May - a busy time for tourism. I'd happily purchase tickets ahead, and I see some sites online, but don't know if they're legitimate, like GetYourGuide. Anyone use one of those? The RS guide says after 4 pm is not as busy, and I'm fine with going later in the day. TIA
Are you looking for a tour or just tickets to the site?
This appears to be the official website for Jeronimos Monastery: http://www.patrimoniocultural.gov.pt/en/museus-e-monumentos/dgpc/m/mosteiro-dos-jeronimos/
The DGPC online tickets link you can find by scrolling down is unfortunately broken at the moment. I hope that's just temporary. I see that entry to the monastery is free on Sundays for Portuguese citizens, so it is likely to be considerably busier that day than any other day of the week.
The DGPC admission fees link shows ticket prices for (apparently) all the sites managed by DGPC. I haven't pushed that entire document through a translater, but it seems the entry price is 10 euros. If any of your group are 65 or over, there's a 50% discount. You'll need a document showing proof of age; I'd recommend passports. There are some combination tickets that might interest you; they give substantial savings.
In May 2019 I bought tickets to Jeronimos Monastery the day before we planned to go. I don't think it was the official site. I'm sorry I don't remember its name. It was in English and I did have to exchange the voucher for actual tickets. Everything went smoothly. We arrived about 15 minutes before opening and the monastery itself was not crowded. I have a photo of the courtyard with absolutely no one in it. It was not a Sunday but there was a commissioning of naval officers occurring in the chapel so the line to enter the chapel was quite long.
Thanks for your replies, helpful. I never got the link to work for purchasing tickets on the Monastery's site, figured it was never going to work. And I was using old intel, used to be only the first Sunday of the month were free to the Portuguese, and so Sunday may be too crowded. Starting to think Saturday late afternoon (we fly in that morning) or a quick trip Tuesday am may be better. Any other tips welcome
Can’t help with the advance purchase question, as we stood in line to buy tickets in August, which, honestly wasn’t that bad. Low numbers of tourists made advance purchase unnecessary. What was bad, however, was the sun and the heat. There is no shade on the hot pavement there, and we felt it even waiting a few minutes to buy tickets. Wear a hat and take a water bottle. Sunglasses wouldn’t hurt, either.