How do I find the answer to the question below?

Salonica is today a provincial city in a small country. For centuries it was the second city of a major empire. Little or nothing is now left of that heritage. What is it about the past of this city, however, that can provide lessons for the larger universe of European cities today?

http://www.google.com/webhp?source=search_app#q=Salonica+history

I'd look at how various ethnic group lived together.

To find the answer to this question, you would need to conduct research on the history of Salonica, also known as Thessaloniki. Here's a step-by-step guide on how you can find the relevant information:

1. Start by searching for reputable sources of information. Reliable sources may include scholarly articles and books, historical archives, reputable websites, or academic databases. Focus on sources that provide in-depth analysis of the history of Salonica and its significance to European cities today.

2. Use search engines such as Google or Bing to find relevant keywords. Try searching for phrases like "history of Salonica," "Thessaloniki in the past," or "lessons for European cities from Salonica." This will help you locate potential sources that discuss the topic of interest.

3. Consult scholarly articles and books. Look for publications written by historians, urban planners, or experts in European history. Libraries, both physical and online, are excellent resources for finding books and academic journals on the subject.

4. Consider exploring historical archives and digital collections that may contain primary sources related to Salonica. These can include documents, photographs, maps, or personal accounts that shed light on the city's past.

5. Analyze the information you find. Pay attention to key events, cultural aspects, architectural heritage, or any other significant factors that contributed to the city's historical importance. Look for themes or lessons that can be applied to contemporary European cities.

6. Consider the context and relevance of the information you discover. Think about how Salonica's history can provide lessons or insights for European cities today. Reflect on factors such as urban planning, cultural preservation, economic development, or social cohesion.

7. Use critical thinking skills to form your own conclusions. Think about the connections you draw between Salonica's past and present-day European cities. Be mindful of any biases in the sources you've used and consider alternate perspectives.

By following these steps and conducting thorough research, you should be able to find the information you need to answer the question about Salonica's past and its potential lessons for European cities today.