Because Beyazıt is a trading quarter before it is anything else, and a trading quarter is a different place on a Tuesday than on a Sunday. The streets, the noise, the crowds and the opening hours all follow the working week rather than the tourist calendar. Almost nobody checks this before booking, and it explains most of the contradictory reviews of hotels in this part of the old city.
On a weekday morning Beyazıt is loud, fast and full of handcarts, with wholesale deliveries, porters and buyers filling the lanes between the university, the covered market and the streets running down towards Laleli. This is the quarter functioning as it has for centuries and it is genuinely interesting to watch. It is also the reason a mid-morning walk with a suitcase is a bad idea here.
AHC Grand Bazaar Hotel is on Abıhayat Sokak in the Mimar Kemalettin quarter, in the block of streets between the main avenue and the market gates, which is the part of Beyazıt that empties out in the evening. Being one street back from the trading spine is what makes the difference between sleeping in the noise and sleeping beside it. Both the covered market and the university square are a short walk uphill.
The wholesale trade shuts, the porters disappear and the quarter loses most of its weekday noise, which makes Beyazıt calmer and considerably emptier. Whether that is good news depends on what you came for. A visitor who wanted to watch the district work will feel they missed it; a visitor who wanted to sleep will feel they chose well.
No, it closes one day each week and on public holidays, and its closure changes the whole quarter around it because so many nearby shops follow the same rhythm. Confirm the day before you build an afternoon around it, since it is the single most common wasted excursion in the old city. If your stay is short, plan the market visit for the first full day rather than the last.
They change it completely: during the major holidays the trading district can be almost shut while the parks and waterfronts are at their busiest of the year. Travel dates that fall in those weeks need a different plan rather than the same plan with more patience. Check what your dates coincide with before you decide where in the old city to sleep.
The main campus sits at the top of Beyazıt Square and it sets the rhythm of the surrounding streets, which means cheap places to eat, a second-hand book market beside the bazaar and a noticeable change of atmosphere when term ends. In the university vacations the quarter loses a layer of its daily life. It also becomes appreciably easier to get a table at lunchtime.
Weekday mornings and late weekday afternoons, when the lanes around the market are full of goods moving in and out and vehicle access is awkward. If your flight lands in that window, plan for the last stretch to be on foot with your bags. Arriving on a quiet evening in Beyazıt is a completely different experience from arriving at eleven on a Tuesday.
Put the covered market and the trading streets on your first full weekday, keep the parks and the waterfront for the closed day, and do your arriving and departing outside the morning rush.
In Beyazıt the date on your reservation changes what you get more than the street does. If a working old-city quarter is what you are after, look at the rooms at AHC Grand Bazaar Hotel and send your arrival day and time through the contact page so somebody can tell you what the streets will be doing when you turn up.