I went to some cathedrals and churches for on-site research. Each of buildings had different circumstance. Some buildings were crowded with people but other buildings were secluded (+ some were not open). In addition, some buildings were quite dark, while others were not that dark. In the Trinity church, I sat in the chair and observed people. Most of them had a party and they chatted each other. It seemed like a tourist spot, not a religious building. They took pictures and was standing in a long line for bathroom. Also, a lot of people looked like foreigners and church provided guide brochures with several languages. However, it does not look efficient. It might be a kind of waste. Can I combine it as one? In fact, if I use a digital device such as mobile phone, it is a very easy problem. We can change the language with one button. However, I want to make it with paper(analog material). How come I am obsessed by paper. I thought of this question for a while. First of all, I do not want to spend my mobile phone storage for one-time application. I will get rid of this app after I look over there and it is annoying. Second, if I am in foreign country, I am sensitive to use data network. Unless I install the app before leave, I could not install the app on the tourist spot. By the way, I want to give patrons fun with my idea providing hidden images and is it generally fun? I am not sure because it is subjective matter. However, if I add some pragmatic features (ex. multi languages on one slide) on it, I could persuade people more easily.