If you want to take and use photos of a building that is copyright protected, you can try sending an email to the building managerial office requesting permission. They can just as easily say yes as no, and if you receive a positive response you may be free to go ahead without fear. If your email is ignored, you can proceed with caution. My legal consultant said that in Israel, judges do not like people who do not respond and then pounce later with a law-suit because that seems like entrapment. However, this may not be true in other jurisdictions. You may be well advised to try and get a signed property release. The American Society of Media Photographers has a discussion of this topic on their website.
If you want to take commercial photos of sculptures, buildings or other features in enclosed areas, such as the Tel Aviv University campus or the inside of a train station, for example, you need to send an email to the directorate of the facility in question. Handle their response or lack of response as per the discussion above regarding buildings.
Regarding sculptures in outdoor public spaces, you may not know if a sculpture is on permanent or temporary display, the former meaning it is in the public domain and the latter meaning it is not. Israeli law is somewhat considerate of the naive photographer, stating that if it is reasonable that the photographer did not know that an object is copyright protected, the court may refuse to sue for infringement. This may not be true in some other countries, however, and it is best that you seek out the copyright holder, who may or may not be the owner of the property on which the sculpture stands.
Remember, this discussion pertains to commercial use of your photographs. If your photos are for editorial use, fair use laws are pertinent and you can more freely use the images in a way that is not demeaning to the copyright holder (such as implying that it is in some way connected with illegal activity if that is not true).
For a discussion of editorial and fair use doctrines, click here.