Unfortunately, that has been tried in the past. According to the British Partition Jerusalem was to be an international city. After '48, when Jordan controlled it, they signed a treaty with Israel allowing free entry. Unfortunately, in both cases, Jews were not allowed access, and for much of that time, neither were Christians. Many synagogues in Jerusalem were destroyed and the wailing wall was desecrated. Since Israel has taken control, holy sites of all religions have had unparralleled accessubility. Every religion has soverignity over it's own sites, and Israel provides a budget for each. I honestly think that this is as close as we'll ever get to an international city.
At least 19 killed, 250 rescued after trains derail in India (AP)